- * This core code is extracted from Michele Bini's curve255.js implementation,
- * which is used as a base for Curve25519 ECDH and Ed25519 EdDSA operations.
- *
- */
- var ns = {};
-
- function _setbit(n, c, v) {
- var i = c >> 4;
- var a = n[i];
- a = a + (1 << (c & 0xf)) * v;
- n[i] = a;
- }
-
- function _getbit(n, c) {
- return (n[c >> 4] >> (c & 0xf)) & 1;
- }
-
- function _ZERO() {
- return [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
- }
-
- function _ONE() {
- return [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
- }
-
- // Basepoint.
- function _BASE() {
- return [9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
- }
-
- // return -1, 0, +1 when a is less than, equal, or greater than b
- function _bigintcmp(a, b) {
- // The following code is a bit tricky to avoid code branching
- var c, abs_r, mask;
- var r = 0;
- for (c = 15; c >= 0; c--) {
- var x = a[c];
- var y = b[c];
- r = r + (x - y) * (1 - r * r);
- // http://graphics.stanford.edu/~seander/bithacks.html#IntegerAbs
- // correct for [-294967295, 294967295]
- mask = r >> 31;
- abs_r = (r + mask) ^ mask;
- // http://stackoverflow.com/questions/596467/how-do-i-convert-a-number-to-an-integer-in-javascript
- // this rounds towards zero
- r = ~~((r << 1) / (abs_r + 1));
- }
- return r;
- }
-
- function _bigintadd(a, b) {
- var r = [];
- var v;
- r[0] = (v = a[0] + b[0]) & 0xffff;
- r[1] = (v = (v >>> 16) + a[1] + b[1]) & 0xffff;
- r[2] = (v = (v >>> 16) + a[2] + b[2]) & 0xffff;
- r[3] = (v = (v >>> 16) + a[3] + b[3]) & 0xffff;
- r[4] = (v = (v >>> 16) + a[4] + b[4]) & 0xffff;
- r[5] = (v = (v >>> 16) + a[5] + b[5]) & 0xffff;
- r[6] = (v = (v >>> 16) + a[6] + b[6]) & 0xffff;
- r[7] = (v = (v >>> 16) + a[7] + b[7]) & 0xffff;
- r[8] = (v = (v >>> 16) + a[8] + b[8]) & 0xffff;
- r[9] = (v = (v >>> 16) + a[9] + b[9]) & 0xffff;
- r[10] = (v = (v >>> 16) + a[10] + b[10]) & 0xffff;
- r[11] = (v = (v >>> 16) + a[11] + b[11]) & 0xffff;
- r[12] = (v = (v >>> 16) + a[12] + b[12]) & 0xffff;
- r[13] = (v = (v >>> 16) + a[13] + b[13]) & 0xffff;
- r[14] = (v = (v >>> 16) + a[14] + b[14]) & 0xffff;
- r[15] = (v >>> 16) + a[15] + b[15];
- return r;
- }
-
- function _bigintsub(a, b) {
- var r = [];
- var v;
- r[0] = (v = 0x80000 + a[0] - b[0]) & 0xffff;
- r[1] = (v = (v >>> 16) + 0x7fff8 + a[1] - b[1]) & 0xffff;
- r[2] = (v = (v >>> 16) + 0x7fff8 + a[2] - b[2]) & 0xffff;
- r[3] = (v = (v >>> 16) + 0x7fff8 + a[3] - b[3]) & 0xffff;
- r[4] = (v = (v >>> 16) + 0x7fff8 + a[4] - b[4]) & 0xffff;
- r[5] = (v = (v >>> 16) + 0x7fff8 + a[5] - b[5]) & 0xffff;
- r[6] = (v = (v >>> 16) + 0x7fff8 + a[6] - b[6]) & 0xffff;
- r[7] = (v = (v >>> 16) + 0x7fff8 + a[7] - b[7]) & 0xffff;
- r[8] = (v = (v >>> 16) + 0x7fff8 + a[8] - b[8]) & 0xffff;
- r[9] = (v = (v >>> 16) + 0x7fff8 + a[9] - b[9]) & 0xffff;
- r[10] = (v = (v >>> 16) + 0x7fff8 + a[10] - b[10]) & 0xffff;
- r[11] = (v = (v >>> 16) + 0x7fff8 + a[11] - b[11]) & 0xffff;
- r[12] = (v = (v >>> 16) + 0x7fff8 + a[12] - b[12]) & 0xffff;
- r[13] = (v = (v >>> 16) + 0x7fff8 + a[13] - b[13]) & 0xffff;
- r[14] = (v = (v >>> 16) + 0x7fff8 + a[14] - b[14]) & 0xffff;
- r[15] = (v >>> 16) - 8 + a[15] - b[15];
- return r;
- }
-
- function _sqr8h(a7, a6, a5, a4, a3, a2, a1, a0) {
- // 'division by 0x10000' can not be replaced by '>> 16' because
- // more than 32 bits of precision are needed similarly
- // 'multiplication by 2' cannot be replaced by '<< 1'
- var r = [];
- var v;
- r[0] = (v = a0 * a0) & 0xffff;
- r[1] = (v = (0 | (v / 0x10000)) + 2 * a0 * a1) & 0xffff;
- r[2] = (v = (0 | (v / 0x10000)) + 2 * a0 * a2 + a1 * a1) & 0xffff;
- r[3] = (v = (0 | (v / 0x10000)) + 2 * a0 * a3 + 2 * a1 * a2) & 0xffff;
- r[4] = (v = (0 | (v / 0x10000)) + 2 * a0 * a4 + 2 * a1 * a3 + a2
- * a2) & 0xffff;
- r[5] = (v = (0 | (v / 0x10000)) + 2 * a0 * a5 + 2 * a1 * a4 + 2
- * a2 * a3) & 0xffff;
- r[6] = (v = (0 | (v / 0x10000)) + 2 * a0 * a6 + 2 * a1 * a5 + 2
- * a2 * a4 + a3 * a3) & 0xffff;
- r[7] = (v = (0 | (v / 0x10000)) + 2 * a0 * a7 + 2 * a1 * a6 + 2
- * a2 * a5 + 2 * a3 * a4) & 0xffff;
- r[8] = (v = (0 | (v / 0x10000)) + 2 * a1 * a7 + 2 * a2 * a6 + 2
- * a3 * a5 + a4 * a4) & 0xffff;
- r[9] = (v = (0 | (v / 0x10000)) + 2 * a2 * a7 + 2 * a3 * a6 + 2
- * a4 * a5) & 0xffff;
- r[10] = (v = (0 | (v / 0x10000)) + 2 * a3 * a7 + 2 * a4 * a6
- + a5 * a5) & 0xffff;
- r[11] = (v = (0 | (v / 0x10000)) + 2 * a4 * a7 + 2 * a5 * a6) & 0xffff;
- r[12] = (v = (0 | (v / 0x10000)) + 2 * a5 * a7 + a6 * a6) & 0xffff;
- r[13] = (v = (0 | (v / 0x10000)) + 2 * a6 * a7) & 0xffff;
- r[14] = (v = (0 | (v / 0x10000)) + a7 * a7) & 0xffff;
- r[15] = 0 | (v / 0x10000);
- return r;
- }
-
- function _sqrmodp(a) {
- var x = _sqr8h(a[15], a[14], a[13], a[12], a[11], a[10], a[9],
- a[8]);
- var z = _sqr8h(a[7], a[6], a[5], a[4], a[3], a[2], a[1], a[0]);
- var y = _sqr8h(a[15] + a[7], a[14] + a[6], a[13] + a[5], a[12]
- + a[4],
- a[11] + a[3], a[10] + a[2], a[9] + a[1], a[8]
- + a[0]);
- var r = [];
- var v;
- r[0] = (v = 0x800000 + z[0] + (y[8] - x[8] - z[8] + x[0] - 0x80)
- * 38) & 0xffff;
- r[1] = (v = 0x7fff80 + (v >>> 16) + z[1]
- + (y[9] - x[9] - z[9] + x[1]) * 38) & 0xffff;
- r[2] = (v = 0x7fff80 + (v >>> 16) + z[2]
- + (y[10] - x[10] - z[10] + x[2]) * 38) & 0xffff;
- r[3] = (v = 0x7fff80 + (v >>> 16) + z[3]
- + (y[11] - x[11] - z[11] + x[3]) * 38) & 0xffff;
- r[4] = (v = 0x7fff80 + (v >>> 16) + z[4]
- + (y[12] - x[12] - z[12] + x[4]) * 38) & 0xffff;
- r[5] = (v = 0x7fff80 + (v >>> 16) + z[5]
- + (y[13] - x[13] - z[13] + x[5]) * 38) & 0xffff;
- r[6] = (v = 0x7fff80 + (v >>> 16) + z[6]
- + (y[14] - x[14] - z[14] + x[6]) * 38) & 0xffff;
- r[7] = (v = 0x7fff80 + (v >>> 16) + z[7]
- + (y[15] - x[15] - z[15] + x[7]) * 38) & 0xffff;
- r[8] = (v = 0x7fff80 + (v >>> 16) + z[8] + y[0] - x[0] - z[0]
- + x[8] * 38) & 0xffff;
- r[9] = (v = 0x7fff80 + (v >>> 16) + z[9] + y[1] - x[1] - z[1]
- + x[9] * 38) & 0xffff;
- r[10] = (v = 0x7fff80 + (v >>> 16) + z[10] + y[2] - x[2] - z[2]
- + x[10] * 38) & 0xffff;
- r[11] = (v = 0x7fff80 + (v >>> 16) + z[11] + y[3] - x[3] - z[3]
- + x[11] * 38) & 0xffff;
- r[12] = (v = 0x7fff80 + (v >>> 16) + z[12] + y[4] - x[4] - z[4]
- + x[12] * 38) & 0xffff;
- r[13] = (v = 0x7fff80 + (v >>> 16) + z[13] + y[5] - x[5] - z[5]
- + x[13] * 38) & 0xffff;
- r[14] = (v = 0x7fff80 + (v >>> 16) + z[14] + y[6] - x[6] - z[6]
- + x[14] * 38) & 0xffff;
- r[15] = 0x7fff80 + (v >>> 16) + z[15] + y[7] - x[7] - z[7]
- + x[15] * 38;
- _reduce(r);
- return r;
- }
-
- function _mul8h(a7, a6, a5, a4, a3, a2, a1, a0, b7, b6, b5, b4, b3,
- b2, b1, b0) {
- // 'division by 0x10000' can not be replaced by '>> 16' because
- // more than 32 bits of precision are needed
- var r = [];
- var v;
- r[0] = (v = a0 * b0) & 0xffff;
- r[1] = (v = (0 | (v / 0x10000)) + a0 * b1 + a1 * b0) & 0xffff;
- r[2] = (v = (0 | (v / 0x10000)) + a0 * b2 + a1 * b1 + a2 * b0) & 0xffff;
- r[3] = (v = (0 | (v / 0x10000)) + a0 * b3 + a1 * b2 + a2 * b1
- + a3 * b0) & 0xffff;
- r[4] = (v = (0 | (v / 0x10000)) + a0 * b4 + a1 * b3 + a2 * b2
- + a3 * b1 + a4 * b0) & 0xffff;
- r[5] = (v = (0 | (v / 0x10000)) + a0 * b5 + a1 * b4 + a2 * b3
- + a3 * b2 + a4 * b1 + a5 * b0) & 0xffff;
- r[6] = (v = (0 | (v / 0x10000)) + a0 * b6 + a1 * b5 + a2 * b4
- + a3 * b3 + a4 * b2 + a5 * b1 + a6 * b0) & 0xffff;
- r[7] = (v = (0 | (v / 0x10000)) + a0 * b7 + a1 * b6 + a2 * b5
- + a3 * b4 + a4 * b3 + a5 * b2 + a6 * b1 + a7 * b0) & 0xffff;
- r[8] = (v = (0 | (v / 0x10000)) + a1 * b7 + a2 * b6 + a3 * b5
- + a4 * b4 + a5 * b3 + a6 * b2 + a7 * b1) & 0xffff;
- r[9] = (v = (0 | (v / 0x10000)) + a2 * b7 + a3 * b6 + a4 * b5
- + a5 * b4 + a6 * b3 + a7 * b2) & 0xffff;
- r[10] = (v = (0 | (v / 0x10000)) + a3 * b7 + a4 * b6 + a5 * b5
- + a6 * b4 + a7 * b3) & 0xffff;
- r[11] = (v = (0 | (v / 0x10000)) + a4 * b7 + a5 * b6 + a6 * b5
- + a7 * b4) & 0xffff;
- r[12] = (v = (0 | (v / 0x10000)) + a5 * b7 + a6 * b6 + a7 * b5) & 0xffff;
- r[13] = (v = (0 | (v / 0x10000)) + a6 * b7 + a7 * b6) & 0xffff;
- r[14] = (v = (0 | (v / 0x10000)) + a7 * b7) & 0xffff;
- r[15] = (0 | (v / 0x10000));
- return r;
- }
-
- function _mulmodp(a, b) {
- // Karatsuba multiplication scheme: x*y = (b^2+b)*x1*y1 -
- // b*(x1-x0)*(y1-y0) + (b+1)*x0*y0
- var x = _mul8h(a[15], a[14], a[13], a[12], a[11], a[10], a[9],
- a[8], b[15], b[14], b[13], b[12], b[11], b[10],
- b[9], b[8]);
- var z = _mul8h(a[7], a[6], a[5], a[4], a[3], a[2], a[1], a[0],
- b[7], b[6], b[5], b[4], b[3], b[2], b[1], b[0]);
- var y = _mul8h(a[15] + a[7], a[14] + a[6], a[13] + a[5], a[12]
- + a[4],
- a[11] + a[3], a[10] + a[2], a[9] + a[1], a[8]
- + a[0],
- b[15] + b[7], b[14] + b[6], b[13] + b[5], b[12]
- + b[4],
- b[11] + b[3], b[10] + b[2], b[9] + b[1], b[8]
- + b[0]);
- var r = [];
- var v;
- r[0] = (v = 0x800000 + z[0] + (y[8] - x[8] - z[8] + x[0] - 0x80)
- * 38) & 0xffff;
- r[1] = (v = 0x7fff80 + (v >>> 16) + z[1]
- + (y[9] - x[9] - z[9] + x[1]) * 38) & 0xffff;
- r[2] = (v = 0x7fff80 + (v >>> 16) + z[2]
- + (y[10] - x[10] - z[10] + x[2]) * 38) & 0xffff;
- r[3] = (v = 0x7fff80 + (v >>> 16) + z[3]
- + (y[11] - x[11] - z[11] + x[3]) * 38) & 0xffff;
- r[4] = (v = 0x7fff80 + (v >>> 16) + z[4]
- + (y[12] - x[12] - z[12] + x[4]) * 38) & 0xffff;
- r[5] = (v = 0x7fff80 + (v >>> 16) + z[5]
- + (y[13] - x[13] - z[13] + x[5]) * 38) & 0xffff;
- r[6] = (v = 0x7fff80 + (v >>> 16) + z[6]
- + (y[14] - x[14] - z[14] + x[6]) * 38) & 0xffff;
- r[7] = (v = 0x7fff80 + (v >>> 16) + z[7]
- + (y[15] - x[15] - z[15] + x[7]) * 38) & 0xffff;
- r[8] = (v = 0x7fff80 + (v >>> 16) + z[8] + y[0] - x[0] - z[0]
- + x[8] * 38) & 0xffff;
- r[9] = (v = 0x7fff80 + (v >>> 16) + z[9] + y[1] - x[1] - z[1]
- + x[9] * 38) & 0xffff;
- r[10] = (v = 0x7fff80 + (v >>> 16) + z[10] + y[2] - x[2] - z[2]
- + x[10] * 38) & 0xffff;
- r[11] = (v = 0x7fff80 + (v >>> 16) + z[11] + y[3] - x[3] - z[3]
- + x[11] * 38) & 0xffff;
- r[12] = (v = 0x7fff80 + (v >>> 16) + z[12] + y[4] - x[4] - z[4]
- + x[12] * 38) & 0xffff;
- r[13] = (v = 0x7fff80 + (v >>> 16) + z[13] + y[5] - x[5] - z[5]
- + x[13] * 38) & 0xffff;
- r[14] = (v = 0x7fff80 + (v >>> 16) + z[14] + y[6] - x[6] - z[6]
- + x[14] * 38) & 0xffff;
- r[15] = 0x7fff80 + (v >>> 16) + z[15] + y[7] - x[7] - z[7]
- + x[15] * 38;
- _reduce(r);
- return r;
- }
-
- function _reduce(arr) {
- var aCopy = arr.slice(0);
- var choice = [arr, aCopy];
- var v = arr[15];
- // Use the dummy copy instead of just returning to be more constant time.
- var a = choice[(v < 0x8000) & 1];
- a[15] = v & 0x7fff;
- // >32-bits of precision are required here so '/ 0x8000' can not be
- // replaced by the arithmetic equivalent '>>> 15'
- v = (0 | (v / 0x8000)) * 19;
- a[0] = (v += a[0]) & 0xffff;
- v = v >>> 16;
- a[1] = (v += a[1]) & 0xffff;
- v = v >>> 16;
- a[2] = (v += a[2]) & 0xffff;
- v = v >>> 16;
- a[3] = (v += a[3]) & 0xffff;
- v = v >>> 16;
- a[4] = (v += a[4]) & 0xffff;
- v = v >>> 16;
- a[5] = (v += a[5]) & 0xffff;
- v = v >>> 16;
- a[6] = (v += a[6]) & 0xffff;
- v = v >>> 16;
- a[7] = (v += a[7]) & 0xffff;
- v = v >>> 16;
- a[8] = (v += a[8]) & 0xffff;
- v = v >>> 16;
- a[9] = (v += a[9]) & 0xffff;
- v = v >>> 16;
- a[10] = (v += a[10]) & 0xffff;
- v = v >>> 16;
- a[11] = (v += a[11]) & 0xffff;
- v = v >>> 16;
- a[12] = (v += a[12]) & 0xffff;
- v = v >>> 16;
- a[13] = (v += a[13]) & 0xffff;
- v = v >>> 16;
- a[14] = (v += a[14]) & 0xffff;
- v = v >>> 16;
- a[15] += v;
- }
-
- function _addmodp(a, b) {
- var r = [];
- var v;
- r[0] = (v = ((0 | (a[15] >>> 15)) + (0 | (b[15] >>> 15))) * 19
- + a[0] + b[0]) & 0xffff;
- r[1] = (v = (v >>> 16) + a[1] + b[1]) & 0xffff;
- r[2] = (v = (v >>> 16) + a[2] + b[2]) & 0xffff;
- r[3] = (v = (v >>> 16) + a[3] + b[3]) & 0xffff;
- r[4] = (v = (v >>> 16) + a[4] + b[4]) & 0xffff;
- r[5] = (v = (v >>> 16) + a[5] + b[5]) & 0xffff;
- r[6] = (v = (v >>> 16) + a[6] + b[6]) & 0xffff;
- r[7] = (v = (v >>> 16) + a[7] + b[7]) & 0xffff;
- r[8] = (v = (v >>> 16) + a[8] + b[8]) & 0xffff;
- r[9] = (v = (v >>> 16) + a[9] + b[9]) & 0xffff;
- r[10] = (v = (v >>> 16) + a[10] + b[10]) & 0xffff;
- r[11] = (v = (v >>> 16) + a[11] + b[11]) & 0xffff;
- r[12] = (v = (v >>> 16) + a[12] + b[12]) & 0xffff;
- r[13] = (v = (v >>> 16) + a[13] + b[13]) & 0xffff;
- r[14] = (v = (v >>> 16) + a[14] + b[14]) & 0xffff;
- r[15] = (v >>> 16) + (a[15] & 0x7fff) + (b[15] & 0x7fff);
- return r;
- }
-
- function _submodp(a, b) {
- var r = [];
- var v;
- r[0] = (v = 0x80000
- + ((0 | (a[15] >>> 15)) - (0 | (b[15] >>> 15)) - 1)
- * 19 + a[0] - b[0]) & 0xffff;
- r[1] = (v = (v >>> 16) + 0x7fff8 + a[1] - b[1]) & 0xffff;
- r[2] = (v = (v >>> 16) + 0x7fff8 + a[2] - b[2]) & 0xffff;
- r[3] = (v = (v >>> 16) + 0x7fff8 + a[3] - b[3]) & 0xffff;
- r[4] = (v = (v >>> 16) + 0x7fff8 + a[4] - b[4]) & 0xffff;
- r[5] = (v = (v >>> 16) + 0x7fff8 + a[5] - b[5]) & 0xffff;
- r[6] = (v = (v >>> 16) + 0x7fff8 + a[6] - b[6]) & 0xffff;
- r[7] = (v = (v >>> 16) + 0x7fff8 + a[7] - b[7]) & 0xffff;
- r[8] = (v = (v >>> 16) + 0x7fff8 + a[8] - b[8]) & 0xffff;
- r[9] = (v = (v >>> 16) + 0x7fff8 + a[9] - b[9]) & 0xffff;
- r[10] = (v = (v >>> 16) + 0x7fff8 + a[10] - b[10]) & 0xffff;
- r[11] = (v = (v >>> 16) + 0x7fff8 + a[11] - b[11]) & 0xffff;
- r[12] = (v = (v >>> 16) + 0x7fff8 + a[12] - b[12]) & 0xffff;
- r[13] = (v = (v >>> 16) + 0x7fff8 + a[13] - b[13]) & 0xffff;
- r[14] = (v = (v >>> 16) + 0x7fff8 + a[14] - b[14]) & 0xffff;
- r[15] = (v >>> 16) + 0x7ff8 + (a[15] & 0x7fff)
- - (b[15] & 0x7fff);
- return r;
- }
-
- function _invmodp(a) {
- var c = a;
- var i = 250;
- while (--i) {
- a = _sqrmodp(a);
- a = _mulmodp(a, c);
- }
- a = _sqrmodp(a);
- a = _sqrmodp(a);
- a = _mulmodp(a, c);
- a = _sqrmodp(a);
- a = _sqrmodp(a);
- a = _mulmodp(a, c);
- a = _sqrmodp(a);
- a = _mulmodp(a, c);
- return a;
- }
-
- function _mulasmall(a) {
- // 'division by 0x10000' can not be replaced by '>> 16' because
- // more than 32 bits of precision are needed
- var m = 121665;
- var r = [];
- var v;
- r[0] = (v = a[0] * m) & 0xffff;
- r[1] = (v = (0 | (v / 0x10000)) + a[1] * m) & 0xffff;
- r[2] = (v = (0 | (v / 0x10000)) + a[2] * m) & 0xffff;
- r[3] = (v = (0 | (v / 0x10000)) + a[3] * m) & 0xffff;
- r[4] = (v = (0 | (v / 0x10000)) + a[4] * m) & 0xffff;
- r[5] = (v = (0 | (v / 0x10000)) + a[5] * m) & 0xffff;
- r[6] = (v = (0 | (v / 0x10000)) + a[6] * m) & 0xffff;
- r[7] = (v = (0 | (v / 0x10000)) + a[7] * m) & 0xffff;
- r[8] = (v = (0 | (v / 0x10000)) + a[8] * m) & 0xffff;
- r[9] = (v = (0 | (v / 0x10000)) + a[9] * m) & 0xffff;
- r[10] = (v = (0 | (v / 0x10000)) + a[10] * m) & 0xffff;
- r[11] = (v = (0 | (v / 0x10000)) + a[11] * m) & 0xffff;
- r[12] = (v = (0 | (v / 0x10000)) + a[12] * m) & 0xffff;
- r[13] = (v = (0 | (v / 0x10000)) + a[13] * m) & 0xffff;
- r[14] = (v = (0 | (v / 0x10000)) + a[14] * m) & 0xffff;
- r[15] = (0 | (v / 0x10000)) + a[15] * m;
- _reduce(r);
- return r;
- }
-
- function _dbl(x, z) {
- var x_2, z_2, m, n, o;
- m = _sqrmodp(_addmodp(x, z));
- n = _sqrmodp(_submodp(x, z));
- o = _submodp(m, n);
- x_2 = _mulmodp(n, m);
- z_2 = _mulmodp(_addmodp(_mulasmall(o), m), o);
- return [x_2, z_2];
- }
-
- function _sum(x, z, x_p, z_p, x_1) {
- var x_3, z_3, p, q;
- p = _mulmodp(_submodp(x, z), _addmodp(x_p, z_p));
- q = _mulmodp(_addmodp(x, z), _submodp(x_p, z_p));
- x_3 = _sqrmodp(_addmodp(p, q));
- z_3 = _mulmodp(_sqrmodp(_submodp(p, q)), x_1);
- return [x_3, z_3];
- }
-
- function _generateKey(curve25519) {
- var buffer = crypto.randomBytes(32);
-
- // For Curve25519 DH keys, we need to apply some bit mask on generated
- // keys:
- // * clear bit 0, 1, 2 of first byte
- // * clear bit 7 of last byte
- // * set bit 6 of last byte
- if (curve25519 === true) {
- buffer[0] &= 0xf8;
- buffer[31] = (buffer[31] & 0x7f) | 0x40;
- }
- var result = [];
- for (var i = 0; i < buffer.length; i++) {
- result.push(String.fromCharCode(buffer[i]));
- }
- return result.join('');
- }
-
- // Expose some functions to the outside through this name space.
- // Note: This is not part of the public API.
- ns.getbit = _getbit;
- ns.setbit = _setbit;
- ns.addmodp = _addmodp;
- ns.invmodp = _invmodp;
- ns.mulmodp = _mulmodp;
- ns.reduce = _reduce;
- ns.dbl = _dbl;
- ns.sum = _sum;
- ns.ZERO = _ZERO;
- ns.ONE = _ONE;
- ns.BASE = _BASE;
- ns.bigintadd = _bigintadd;
- ns.bigintsub = _bigintsub;
- ns.bigintcmp = _bigintcmp;
- ns.mulmodp = _mulmodp;
- ns.sqrmodp = _sqrmodp;
- ns.generateKey = _generateKey;
-
-
-module.exports = ns;
-
-},{"crypto":194}],60:[function(require,module,exports){
-"use strict";
-/**
- * @fileOverview
- * Core operations on curve 25519 required for the higher level modules.
- */
-
-/*
- * Copyright (c) 2007, 2013, 2014 Michele Bini
- * Copyright (c) 2014 Mega Limited
- * under the MIT License.
- *
- * Authors: Guy K. Kloss, Michele Bini
- *
- * You should have received a copy of the license along with this program.
- */
-
-var core = require('./core');
-var utils = require('./utils');
-
- /**
- * @exports jodid25519/curve255
- * Legacy compatibility module for Michele Bini's previous curve255.js.
- *
- * @description
- * Legacy compatibility module for Michele Bini's previous curve255.js.
- *
- *
- * This code presents an API with all key formats as previously available
- * from Michele Bini's curve255.js implementation.
- *
- */
- var ns = {};
-
- function curve25519_raw(f, c) {
- var a, x_1, q;
-
- x_1 = c;
- a = core.dbl(x_1, core.ONE());
- q = [x_1, core.ONE()];
-
- var n = 255;
-
- while (core.getbit(f, n) == 0) {
- n--;
- // For correct constant-time operation, bit 255 should always be
- // set to 1 so the following 'while' loop is never entered.
- if (n < 0) {
- return core.ZERO();
- }
- }
- n--;
-
- var aq = [a, q];
-
- while (n >= 0) {
- var r, s;
- var b = core.getbit(f, n);
- r = core.sum(aq[0][0], aq[0][1], aq[1][0], aq[1][1], x_1);
- s = core.dbl(aq[1 - b][0], aq[1 - b][1]);
- aq[1 - b] = s;
- aq[b] = r;
- n--;
- }
- q = aq[1];
-
- q[1] = core.invmodp(q[1]);
- q[0] = core.mulmodp(q[0], q[1]);
- core.reduce(q[0]);
- return q[0];
- }
-
- function curve25519b32(a, b) {
- return _base32encode(curve25519(_base32decode(a),
- _base32decode(b)));
- }
-
- function curve25519(f, c) {
- if (!c) {
- c = core.BASE();
- }
- f[0] &= 0xFFF8;
- f[15] = (f[15] & 0x7FFF) | 0x4000;
- return curve25519_raw(f, c);
- }
-
- function _hexEncodeVector(k) {
- var hexKey = utils.hexEncode(k);
- // Pad with '0' at the front.
- hexKey = new Array(64 + 1 - hexKey.length).join('0') + hexKey;
- // Invert bytes.
- return hexKey.split(/(..)/).reverse().join('');
- }
-
- function _hexDecodeVector(v) {
- // assert(length(x) == 64);
- // Invert bytes.
- var hexKey = v.split(/(..)/).reverse().join('');
- return utils.hexDecode(hexKey);
- }
-
-
- // Expose some functions to the outside through this name space.
-
- /**
- * Computes the scalar product of a point on the curve 25519.
- *
- * This function is used for the DH key-exchange protocol.
- *
- * Before multiplication, some bit operations are applied to the
- * private key to ensure it is a valid Curve25519 secret key.
- * It is the user's responsibility to make sure that the private
- * key is a uniformly random, secret value.
- *
- * @function
- * @param f {array}
- * Private key.
- * @param c {array}
- * Public point on the curve. If not given, the curve's base point is used.
- * @returns {array}
- * Key point resulting from scalar product.
- */
- ns.curve25519 = curve25519;
-
- /**
- * Computes the scalar product of a point on the curve 25519.
- *
- * This variant does not make sure that the private key is valid.
- * The user has the responsibility to ensure the private key is
- * valid or that this results in a safe protocol. Unless you know
- * exactly what you are doing, you should not use this variant,
- * please use 'curve25519' instead.
- *
- * @function
- * @param f {array}
- * Private key.
- * @param c {array}
- * Public point on the curve. If not given, the curve's base point is used.
- * @returns {array}
- * Key point resulting from scalar product.
- */
- ns.curve25519_raw = curve25519_raw;
-
- /**
- * Encodes the internal representation of a key to a canonical hex
- * representation.
- *
- * This is the format commonly used in other libraries and for
- * test vectors, and is equivalent to the hex dump of the key in
- * little-endian binary format.
- *
- * @function
- * @param n {array}
- * Array representation of key.
- * @returns {string}
- * Hexadecimal string representation of key.
- */
- ns.hexEncodeVector = _hexEncodeVector;
-
- /**
- * Decodes a canonical hex representation of a key
- * to an internally compatible array representation.
- *
- * @function
- * @param n {string}
- * Hexadecimal string representation of key.
- * @returns {array}
- * Array representation of key.
- */
- ns.hexDecodeVector = _hexDecodeVector;
-
- /**
- * Encodes the internal representation of a key into a
- * hexadecimal representation.
- *
- * This is a strict positional notation, most significant digit first.
- *
- * @function
- * @param n {array}
- * Array representation of key.
- * @returns {string}
- * Hexadecimal string representation of key.
- */
- ns.hexencode = utils.hexEncode;
-
- /**
- * Decodes a hex representation of a key to an internally
- * compatible array representation.
- *
- * @function
- * @param n {string}
- * Hexadecimal string representation of key.
- * @returns {array}
- * Array representation of key.
- */
- ns.hexdecode = utils.hexDecode;
-
- /**
- * Encodes the internal representation of a key to a base32
- * representation.
- *
- * @function
- * @param n {array}
- * Array representation of key.
- * @returns {string}
- * Base32 string representation of key.
- */
- ns.base32encode = utils.base32encode;
-
- /**
- * Decodes a base32 representation of a key to an internally
- * compatible array representation.
- *
- * @function
- * @param n {string}
- * Base32 string representation of key.
- * @returns {array}
- * Array representation of key.
- */
- ns.base32decode = utils.base32decode;
-
-module.exports = ns;
-
-},{"./core":59,"./utils":63}],61:[function(require,module,exports){
-(function (Buffer){
-"use strict";
-/**
- * @fileOverview
- * EC Diffie-Hellman operations on Curve25519.
- */
-
-/*
- * Copyright (c) 2014 Mega Limited
- * under the MIT License.
- *
- * Authors: Guy K. Kloss
- *
- * You should have received a copy of the license along with this program.
- */
-
-var core = require('./core');
-var utils = require('./utils');
-var curve255 = require('./curve255');
-
-
- /**
- * @exports jodid25519/dh
- * EC Diffie-Hellman operations on Curve25519.
- *
- * @description
- * EC Diffie-Hellman operations on Curve25519.
- */
- var ns = {};
-
-
- function _toString(vector) {
- var u = new Uint16Array(vector);
- return (new Buffer(new Uint8Array(u.buffer)));
- }
-
- function _fromString(vector) {
- if (Buffer.isBuffer(vector)) {
- var u = new Uint8Array(vector);
- return (new Uint16Array(u.buffer));
- }
-
- var result = new Array(16);
- for (var i = 0, l = 0; i < vector.length; i += 2) {
- result[l] = (vector.charCodeAt(i + 1) << 8) | vector.charCodeAt(i);
- l++;
- }
- return result;
- }
-
-
- /**
- * Computes a key through scalar multiplication of a point on the curve 25519.
- *
- * This function is used for the DH key-exchange protocol. It computes a
- * key based on a secret key with a public component (opponent's public key
- * or curve base point if not given) by using scalar multiplication.
- *
- * Before multiplication, some bit operations are applied to the
- * private key to ensure it is a valid Curve25519 secret key.
- * It is the user's responsibility to make sure that the private
- * key is a uniformly random, secret value.
- *
- * @function
- * @param privateComponent {string}
- * Private point as byte string on the curve.
- * @param publicComponent {string}
- * Public point as byte string on the curve. If not given, the curve's
- * base point is used.
- * @returns {string}
- * Key point as byte string resulting from scalar product.
- */
- ns.computeKey = function(privateComponent, publicComponent) {
- if (publicComponent) {
- return _toString(curve255.curve25519(_fromString(privateComponent),
- _fromString(publicComponent)));
- } else {
- return _toString(curve255.curve25519(_fromString(privateComponent)));
- }
- };
-
- /**
- * Computes the public key to a private key on the curve 25519.
- *
- * Before multiplication, some bit operations are applied to the
- * private key to ensure it is a valid Curve25519 secret key.
- * It is the user's responsibility to make sure that the private
- * key is a uniformly random, secret value.
- *
- * @function
- * @param privateKey {string}
- * Private point as byte string on the curve.
- * @returns {string}
- * Public key point as byte string resulting from scalar product.
- */
- ns.publicKey = function(privateKey) {
- return _toString(curve255.curve25519(_fromString(privateKey)));
- };
-
-
- /**
- * Generates a new random private key of 32 bytes length (256 bit).
- *
- * @function
- * @returns {string}
- * Byte string containing a new random private key seed.
- */
- ns.generateKey = function() {
- return core.generateKey(true);
- };
-
-module.exports = ns;
-
-}).call(this,require("buffer").Buffer)
-},{"./core":59,"./curve255":60,"./utils":63,"buffer":185}],62:[function(require,module,exports){
-(function (Buffer){
-"use strict";
-/**
- * @fileOverview
- * Digital signature scheme based on Curve25519 (Ed25519 or EdDSA).
- */
-
-/*
- * Copyright (c) 2011, 2012, 2014 Ron Garret
- * Copyright (c) 2014 Mega Limited
- * under the MIT License.
- *
- * Authors: Guy K. Kloss, Ron Garret
- *
- * You should have received a copy of the license along with this program.
- */
-
-var core = require('./core');
-var curve255 = require('./curve255');
-var utils = require('./utils');
-var BigInteger = require('jsbn').BigInteger;
-var crypto = require('crypto');
-
- /**
- * @exports jodid25519/eddsa
- * Digital signature scheme based on Curve25519 (Ed25519 or EdDSA).
- *
- * @description
- * Digital signature scheme based on Curve25519 (Ed25519 or EdDSA).
- *
- *
- * This code is adapted from fast-djbec.js, a faster but more complicated
- * version of the Ed25519 encryption scheme (as compared to djbec.js).
- * It uses two different representations for big integers: The jsbn
- * BigInteger class, which can represent arbitrary-length numbers, and a
- * special fixed-length representation optimised for 256-bit integers.
- * The reason both are needed is that the Ed25519 algorithm requires some
- * 512-bit numbers.
- */
- var ns = {};
-
- function _bi255(value) {
- if (!(this instanceof _bi255)) {
- return new _bi255(value);
- }
- if (typeof value === 'undefined') {
- return _ZERO;
- }
- var c = value.constructor;
- if ((c === Array || c === Uint16Array || c === Uint32Array) && (value.length === 16)) {
- this.n = value;
- } else if ((c === Array) && (value.length === 32)) {
- this.n = _bytes2bi255(value).n;
- } else if (c === String) {
- this.n = utils.hexDecode(value);
- } else if (c === Number) {
- this.n = [value & 0xffff,
- value >> 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
- } else if (value instanceof _bi255) {
- this.n = value.n.slice(0); // Copy constructor
- } else {
- throw "Bad argument for bignum: " + value;
- }
- }
-
- _bi255.prototype = {
- 'toString' : function() {
- return utils.hexEncode(this.n);
- },
- 'toSource' : function() {
- return '_' + utils.hexEncode(this.n);
- },
- 'plus' : function(n1) {
- return _bi255(core.bigintadd(this.n, n1.n));
- },
- 'minus' : function(n1) {
- return _bi255(core.bigintsub(this.n, n1.n)).modq();
- },
- 'times' : function(n1) {
- return _bi255(core.mulmodp(this.n, n1.n));
- },
- 'divide' : function(n1) {
- return this.times(n1.inv());
- },
- 'sqr' : function() {
- return _bi255(core.sqrmodp(this.n));
- },
- 'cmp' : function(n1) {
- return core.bigintcmp(this.n, n1.n);
- },
- 'equals' : function(n1) {
- return this.cmp(n1) === 0;
- },
- 'isOdd' : function() {
- return (this.n[0] & 1) === 1;
- },
- 'shiftLeft' : function(cnt) {
- _shiftL(this.n, cnt);
- return this;
- },
- 'shiftRight' : function(cnt) {
- _shiftR(this.n, cnt);
- return this;
- },
- 'inv' : function() {
- return _bi255(core.invmodp(this.n));
- },
- 'pow' : function(e) {
- return _bi255(_pow(this.n, e.n));
- },
- 'modq' : function() {
- return _modq(this);
- },
- 'bytes' : function() {
- return _bi255_bytes(this);
- }
- };
-
- function _shiftL(n, cnt) {
- var lastcarry = 0;
- for (var i = 0; i < 16; i++) {
- var carry = n[i] >> (16 - cnt);
- n[i] = (n[i] << cnt) & 0xffff | lastcarry;
- lastcarry = carry;
- }
- return n;
- }
-
- function _shiftR(n, cnt) {
- var lastcarry = 0;
- for (var i = 15; i >= 0; i--) {
- var carry = n[i] << (16 - cnt) & 0xffff;
- n[i] = (n[i] >> cnt) | lastcarry;
- lastcarry = carry;
- }
- return n;
- }
-
- function _bi255_bytes(n) {
- n = _bi255(n); // Make a copy because shiftRight is destructive
- var a = new Array(32);
- for (var i = 31; i >= 0; i--) {
- a[i] = n.n[0] & 0xff;
- n.shiftRight(8);
- }
- return a;
- }
-
- function _bytes2bi255(a) {
- var n = _ZERO;
- for (var i = 0; i < 32; i++) {
- n.shiftLeft(8);
- n = n.plus(_bi255(a[i]));
- }
- return n;
- }
-
- function _pow(n, e) {
- var result = core.ONE();
- for (var i = 0; i < 256; i++) {
- if (core.getbit(e, i) === 1) {
- result = core.mulmodp(result, n);
- }
- n = core.sqrmodp(n);
- }
- return result;
- }
-
- var _ZERO = _bi255(0);
- var _ONE = _bi255(1);
- var _TWO = _bi255(2);
- // This is the core prime.
- var _Q = _bi255([0xffff - 18, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
- 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
- 0xffff, 0xffff, 0x7fff]);
-
- function _modq(n) {
- core.reduce(n.n);
- if (n.cmp(_Q) >= 0) {
- return _modq(n.minus(_Q));
- }
- if (n.cmp(_ZERO) === -1) {
- return _modq(n.plus(_Q));
- } else {
- return n;
- }
- }
-
- // _RECOVERY_EXPONENT = _Q.plus(_bi255(3)).divide(_bi255(8));
- var _RECOVERY_EXPONENT = _bi255('0ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe');
- // _D = _Q.minus(_bi255(121665)).divide(_bi255(121666));
- var _D = _bi255('52036cee2b6ffe738cc740797779e89800700a4d4141d8ab75eb4dca135978a3');
- // _I = _TWO.pow(_Q.minus(_ONE).divide(_bi255(4)));
- var _I = _bi255('2b8324804fc1df0b2b4d00993dfbd7a72f431806ad2fe478c4ee1b274a0ea0b0');
- // _L = _TWO.pow(_bi255(252)).plus(_bi255('14def9dea2f79cd65812631a5cf5d3ed'));
- var _L = _bi255('1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed');
- var _L_BI = _bi('1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed', 16);
-
-
- // ////////////////////////////////////////////////////////////
-
- function _isoncurve(p) {
- var x = p[0];
- var y = p[1];
- var xsqr = x.sqr();
- var ysqr = y.sqr();
- var v = _D.times(xsqr).times(ysqr);
- return ysqr.minus(xsqr).minus(_ONE).minus(v).modq().equals(_ZERO);
- }
-
- function _xrecover(y) {
- var ysquared = y.sqr();
- var xx = ysquared.minus(_ONE).divide(_ONE.plus(_D.times(ysquared)));
- var x = xx.pow(_RECOVERY_EXPONENT);
- if (!(x.times(x).minus(xx).equals(_ZERO))) {
- x = x.times(_I);
- }
- if (x.isOdd()) {
- x = _Q.minus(x);
- }
- return x;
- }
-
- function _x_pt_add(pt1, pt2) {
- var x1 = pt1[0];
- var y1 = pt1[1];
- var z1 = pt1[2];
- var t1 = pt1[3];
- var x2 = pt2[0];
- var y2 = pt2[1];
- var z2 = pt2[2];
- var t2 = pt2[3];
- var A = y1.minus(x1).times(y2.plus(x2));
- var B = y1.plus(x1).times(y2.minus(x2));
- var C = z1.times(_TWO).times(t2);
- var D = t1.times(_TWO).times(z2);
- var E = D.plus(C);
- var F = B.minus(A);
- var G = B.plus(A);
- var H = D.minus(C);
- return [E.times(F), G.times(H), F.times(G), E.times(H)];
- }
-
- function _xpt_double(pt1) {
- var x1 = pt1[0];
- var y1 = pt1[1];
- var z1 = pt1[2];
- var A = x1.times(x1);
- var B = y1.times(y1);
- var C = _TWO.times(z1).times(z1);
- var D = _Q.minus(A);
- var J = x1.plus(y1);
- var E = J.times(J).minus(A).minus(B);
- var G = D.plus(B);
- var F = G.minus(C);
- var H = D.minus(B);
- return [E.times(F), G.times(H), F.times(G), E.times(H)];
- }
-
- function _xpt_mult(pt, n) {
- if (n.equals(_ZERO)) {
- return [_ZERO, _ONE, _ONE, _ZERO];
- }
- var odd = n.isOdd();
- n.shiftRight(1);
- var value = _xpt_double(_xpt_mult(pt, n));
- return odd ? _x_pt_add(value, pt) : value;
- }
-
- function _pt_xform(pt) {
- var x = pt[0];
- var y = pt[1];
- return [x, y, _ONE, x.times(y)];
- }
-
- function _pt_unxform(pt) {
- var x = pt[0];
- var y = pt[1];
- var z = pt[2];
- var invz = z.inv();
- return [x.times(invz), y.times(invz)];
- }
-
- function _scalarmult(pt, n) {
- return _pt_unxform(_xpt_mult(_pt_xform(pt), n));
- }
-
- function _bytesgetbit(bytes, n) {
- return (bytes[bytes.length - (n >>> 3) - 1] >> (n & 7)) & 1;
- }
-
- function _xpt_mult_bytes(pt, bytes) {
- var r = [_ZERO, _ONE, _ONE, _ZERO];
- for (var i = (bytes.length << 3) - 1; i >= 0; i--) {
- r = _xpt_double(r);
- if (_bytesgetbit(bytes, i) === 1) {
- r = _x_pt_add(r, pt);
- }
- }
- return r;
- }
-
- function _scalarmultBytes(pt, bytes) {
- return _pt_unxform(_xpt_mult_bytes(_pt_xform(pt), bytes));
- }
-
- var _by = _bi255(4).divide(_bi255(5));
- var _bx = _xrecover(_by);
- var _bp = [_bx, _by];
-
- function _encodeint(n) {
- return n.bytes(32).reverse();
- }
- function _decodeint(b) {
- return _bi255(b.slice(0).reverse());
- }
-
- function _encodepoint(p) {
- var v = _encodeint(p[1]);
- if (p[0].isOdd()) {
- v[31] |= 0x80;
- }
- return v;
- }
-
- function _decodepoint(v) {
- v = v.slice(0);
- var signbit = v[31] >> 7;
- v[31] &= 127;
- var y = _decodeint(v);
- var x = _xrecover(y);
- if ((x.n[0] & 1) !== signbit) {
- x = _Q.minus(x);
- }
- var p = [x, y];
- if (!_isoncurve(p)) {
- throw ('Point is not on curve');
- }
- return p;
- }
-
- // //////////////////////////////////////////////////
-
- /**
- * Factory function to create a suitable BigInteger.
- *
- * @param value
- * The value for the big integer.
- * @param base {integer}
- * Base of the conversion of elements in ``value``.
- * @returns
- * A BigInteger object.
- */
- function _bi(value, base) {
- if (base !== undefined) {
- if (base === 256) {
- return _bi(utils.string2bytes(value));
- }
- return new BigInteger(value, base);
- } else if (typeof value === 'string') {
- return new BigInteger(value, 10);
- } else if ((value instanceof Array) || (value instanceof Uint8Array)
- || Buffer.isBuffer(value)) {
- return new BigInteger(value);
- } else if (typeof value === 'number') {
- return new BigInteger(value.toString(), 10);
- } else {
- throw "Can't convert " + value + " to BigInteger";
- }
- }
-
- function _bi2bytes(n, cnt) {
- if (cnt === undefined) {
- cnt = (n.bitLength() + 7) >>> 3;
- }
- var bytes = new Array(cnt);
- for (var i = cnt - 1; i >= 0; i--) {
- bytes[i] = n[0] & 255; // n.and(0xff);
- n = n.shiftRight(8);
- }
- return bytes;
- }
-
- BigInteger.prototype.bytes = function(n) {
- return _bi2bytes(this, n);
- };
-
- // /////////////////////////////////////////////////////////
-
- function _bytehash(s) {
- var sha = crypto.createHash('sha512').update(s).digest();
- return _bi2bytes(_bi(sha), 64).reverse();
- }
-
- function _stringhash(s) {
- var sha = crypto.createHash('sha512').update(s).digest();
- return _map(_chr, _bi2bytes(_bi(sha), 64)).join('');
- }
-
- function _inthash(s) {
- // Need a leading 0 to prevent sign extension
- return _bi([0].concat(_bytehash(s)));
- }
-
- function _inthash_lo(s) {
- return _bi255(_bytehash(s).slice(32, 64));
- }
-
- function _inthash_mod_l(s) {
- return _inthash(s).mod(_L_BI);
- }
-
- function _get_a(sk) {
- var a = _inthash_lo(sk);
- a.n[0] &= 0xfff8;
- a.n[15] &= 0x3fff;
- a.n[15] |= 0x4000;
- return a;
- }
-
- function _publickey(sk) {
- return _encodepoint(_scalarmult(_bp, _get_a(sk)));
- }
-
- function _map(f, l) {
- var result = new Array(l.length);
- for (var i = 0; i < l.length; i++) {
- result[i] = f(l[i]);
- }
- return result;
- }
-
- function _chr(n) {
- return String.fromCharCode(n);
- }
-
- function _ord(c) {
- return c.charCodeAt(0);
- }
-
- function _pt_add(p1, p2) {
- return _pt_unxform(_x_pt_add(_pt_xform(p1), _pt_xform(p2)));
- }
-
-
- // Exports for the API.
-
- /**
- * Checks whether a point is on the curve.
- *
- * @function
- * @param point {string}
- * The point to check for in a byte string representation.
- * @returns {boolean}
- * true if the point is on the curve, false otherwise.
- */
- ns.isOnCurve = function(point) {
- try {
- _isoncurve(_decodepoint(utils.string2bytes(point)));
- } catch(e) {
- if (e === 'Point is not on curve') {
- return false;
- } else {
- throw e;
- }
- }
- return true;
- };
-
-
- /**
- * Computes the EdDSA public key.
- *
- *
Note: Seeds should be a byte string, not a unicode string containing
- * multi-byte characters.
- *
- * @function
- * @param keySeed {string}
- * Private key seed in the form of a byte string.
- * @returns {string}
- * Public key as byte string computed from the private key seed
- * (32 bytes).
- */
- ns.publicKey = function(keySeed) {
- return utils.bytes2string(_publickey(keySeed));
- };
-
-
- /**
- * Computes an EdDSA signature of a message.
- *
- *
Notes:
- *
- *
- *
Unicode messages need to be converted to a byte representation
- * (e. g. UTF-8).
- *
If `publicKey` is given, and it is *not* a point of the curve,
- * the signature will be faulty, but no error will be thrown.
- *
- *
- * @function
- * @param message {string}
- * Message in the form of a byte string.
- * @param keySeed {string}
- * Private key seed in the form of a byte string.
- * @param publicKey {string}
- * Public key as byte string (if not present, it will be computed from
- * the private key seed).
- * @returns {string}
- * Detached message signature in the form of a byte string (64 bytes).
- */
- ns.sign = function(message, keySeed, publicKey) {
- if (publicKey === undefined) {
- publicKey = _publickey(keySeed);
- } else {
- publicKey = utils.string2bytes(publicKey);
- }
- var a = _bi(_get_a(keySeed).toString(), 16);
- var hs = _stringhash(keySeed);
- var r = _bytehash(hs.slice(32, 64) + message);
- var rp = _scalarmultBytes(_bp, r);
- var erp = _encodepoint(rp);
- r = _bi(r).mod(_bi(1, 10).shiftLeft(512));
- var s = _map(_chr, erp).join('') + _map(_chr, publicKey).join('') + message;
- s = _inthash_mod_l(s).multiply(a).add(r).mod(_L_BI);
- return utils.bytes2string(erp.concat(_encodeint(s)));
- };
-
-
- /**
- * Verifies an EdDSA signature of a message with the public key.
- *
- *
Note: Unicode messages need to be converted to a byte representation
- * (e. g. UTF-8).
- *
- * @function
- * @param signature {string}
- * Message signature in the form of a byte string. Can be detached
- * (64 bytes), or attached to be sliced off.
- * @param message {string}
- * Message in the form of a byte string.
- * @param publicKey {string}
- * Public key as byte string (if not present, it will be computed from
- * the private key seed).
- * @returns {boolean}
- * true, if the signature verifies.
- */
- ns.verify = function(signature, message, publicKey) {
- signature = utils.string2bytes(signature.slice(0, 64));
- publicKey = utils.string2bytes(publicKey);
- var rpe = signature.slice(0, 32);
- var rp = _decodepoint(rpe);
- var a = _decodepoint(publicKey);
- var s = _decodeint(signature.slice(32, 64));
- var h = _inthash(utils.bytes2string(rpe.concat(publicKey)) + message);
- var v1 = _scalarmult(_bp, s);
- var value = _scalarmultBytes(a, _bi2bytes(h));
- var v2 = _pt_add(rp, value);
- return v1[0].equals(v2[0]) && v1[1].equals(v2[1]);
- };
-
-
- /**
- * Generates a new random private key seed of 32 bytes length (256 bit).
- *
- * @function
- * @returns {string}
- * Byte string containing a new random private key seed.
- */
- ns.generateKeySeed = function() {
- return core.generateKey(false);
- };
-
-module.exports = ns;
-
-}).call(this,{"isBuffer":require("../../../../../../../../../usr/local/lib/node_modules/watchify/node_modules/is-buffer/index.js")})
-},{"../../../../../../../../../usr/local/lib/node_modules/watchify/node_modules/is-buffer/index.js":234,"./core":59,"./curve255":60,"./utils":63,"crypto":194,"jsbn":64}],63:[function(require,module,exports){
-"use strict";
-/**
- * @fileOverview
- * A collection of general utility functions..
- */
-
-/*
- * Copyright (c) 2011, 2012, 2014 Ron Garret
- * Copyright (c) 2007, 2013, 2014 Michele Bini
- * Copyright (c) 2014 Mega Limited
- * under the MIT License.
- *
- * Authors: Guy K. Kloss, Michele Bini, Ron Garret
- *
- * You should have received a copy of the license along with this program.
- */
-
-var core = require('./core');
-
- /**
- * @exports jodid25519/utils
- * A collection of general utility functions..
- *
- * @description
- * A collection of general utility functions..
- */
- var ns = {};
-
- var _HEXCHARS = "0123456789abcdef";
-
- function _hexencode(vector) {
- var result = [];
- for (var i = vector.length - 1; i >= 0; i--) {
- var value = vector[i];
- result.push(_HEXCHARS.substr((value >>> 12) & 0x0f, 1));
- result.push(_HEXCHARS.substr((value >>> 8) & 0x0f, 1));
- result.push(_HEXCHARS.substr((value >>> 4) & 0x0f, 1));
- result.push(_HEXCHARS.substr(value & 0x0f, 1));
- }
- return result.join('');
- }
-
- function _hexdecode(vector) {
- var result = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
- for (var i = vector.length - 1, l = 0; i >= 0; i -= 4) {
- result[l] = (_HEXCHARS.indexOf(vector.charAt(i)))
- | (_HEXCHARS.indexOf(vector.charAt(i - 1)) << 4)
- | (_HEXCHARS.indexOf(vector.charAt(i - 2)) << 8)
- | (_HEXCHARS.indexOf(vector.charAt(i - 3)) << 12);
- l++;
- }
- return result;
- }
-
- var _BASE32CHARS = "abcdefghijklmnopqrstuvwxyz234567";
-
- var _BASE32VALUES = (function () {
- var result = {};
- for (var i = 0; i < _BASE32CHARS.length; i++) {
- result[_BASE32CHARS.charAt(i)] = i;
- }
- return result;
- })();
-
- function _base32encode(n) {
- var c;
- var r = "";
- for (c = 0; c < 255; c += 5) {
- r = _BASE32CHARS.substr(core.getbit(n, c)
- + (core.getbit(n, c + 1) << 1)
- + (core.getbit(n, c + 2) << 2)
- + (core.getbit(n, c + 3) << 3)
- + (core.getbit(n, c + 4) << 4), 1)
- + r;
- }
- return r;
- }
-
- function _base32decode(n) {
- var c = 0;
- var r = core.ZERO();
- var l = n.length;
- for (c = 0; (l > 0) && (c < 255); c += 5) {
- l--;
- var v = _BASE32VALUES[n.substr(l, 1)];
- core.setbit(r, c, v & 1);
- v >>= 1;
- core.setbit(r, c + 1, v & 1);
- v >>= 1;
- core.setbit(r, c + 2, v & 1);
- v >>= 1;
- core.setbit(r, c + 3, v & 1);
- v >>= 1;
- core.setbit(r, c + 4, v & 1);
- }
- return r;
- }
-
- function _map(f, l) {
- var result = new Array(l.length);
- for (var i = 0; i < l.length; i++) {
- result[i] = f(l[i]);
- }
- return result;
- }
-
- function _chr(n) {
- return String.fromCharCode(n);
- }
-
- function _ord(c) {
- return c.charCodeAt(0);
- }
-
- function _bytes2string(bytes) {
- return _map(_chr, bytes).join('');
- }
-
- function _string2bytes(s) {
- return _map(_ord, s);
- }
-
-
- // Expose some functions to the outside through this name space.
-
- /**
- * Encodes an array of unsigned 8-bit integers to a hex string.
- *
- * @function
- * @param vector {array}
- * Array containing the byte values.
- * @returns {string}
- * String containing vector in a hexadecimal representation.
- */
- ns.hexEncode = _hexencode;
-
-
- /**
- * Decodes a hex string to an array of unsigned 8-bit integers.
- *
- * @function
- * @param vector {string}
- * String containing vector in a hexadecimal representation.
- * @returns {array}
- * Array containing the byte values.
- */
- ns.hexDecode = _hexdecode;
-
-
- /**
- * Encodes an array of unsigned 8-bit integers using base32 encoding.
- *
- * @function
- * @param vector {array}
- * Array containing the byte values.
- * @returns {string}
- * String containing vector in a hexadecimal representation.
- */
- ns.base32encode = _base32encode;
-
-
- /**
- * Decodes a base32 encoded string to an array of unsigned 8-bit integers.
- *
- * @function
- * @param vector {string}
- * String containing vector in a hexadecimal representation.
- * @returns {array}
- * Array containing the byte values.
- */
- ns.base32decode = _base32decode;
-
-
- /**
- * Converts an unsigned 8-bit integer array representation to a byte string.
- *
- * @function
- * @param vector {array}
- * Array containing the byte values.
- * @returns {string}
- * Byte string representation of vector.
- */
- ns.bytes2string = _bytes2string;
-
-
- /**
- * Converts a byte string representation to an array of unsigned
- * 8-bit integers.
- *
- * @function
- * @param vector {array}
- * Array containing the byte values.
- * @returns {string}
- * Byte string representation of vector.
- */
- ns.string2bytes = _string2bytes;
-
-module.exports = ns;
-
-},{"./core":59}],64:[function(require,module,exports){
-(function(){
-
- // Copyright (c) 2005 Tom Wu
- // All Rights Reserved.
- // See "LICENSE" for details.
-
- // Basic JavaScript BN library - subset useful for RSA encryption.
-
- // Bits per digit
- var dbits;
-
- // JavaScript engine analysis
- var canary = 0xdeadbeefcafe;
- var j_lm = ((canary&0xffffff)==0xefcafe);
-
- // (public) Constructor
- function BigInteger(a,b,c) {
- if(a != null)
- if("number" == typeof a) this.fromNumber(a,b,c);
- else if(b == null && "string" != typeof a) this.fromString(a,256);
- else this.fromString(a,b);
- }
-
- // return new, unset BigInteger
- function nbi() { return new BigInteger(null); }
-
- // am: Compute w_j += (x*this_i), propagate carries,
- // c is initial carry, returns final carry.
- // c < 3*dvalue, x < 2*dvalue, this_i < dvalue
- // We need to select the fastest one that works in this environment.
-
- // am1: use a single mult and divide to get the high bits,
- // max digit bits should be 26 because
- // max internal value = 2*dvalue^2-2*dvalue (< 2^53)
- function am1(i,x,w,j,c,n) {
- while(--n >= 0) {
- var v = x*this[i++]+w[j]+c;
- c = Math.floor(v/0x4000000);
- w[j++] = v&0x3ffffff;
- }
- return c;
- }
- // am2 avoids a big mult-and-extract completely.
- // Max digit bits should be <= 30 because we do bitwise ops
- // on values up to 2*hdvalue^2-hdvalue-1 (< 2^31)
- function am2(i,x,w,j,c,n) {
- var xl = x&0x7fff, xh = x>>15;
- while(--n >= 0) {
- var l = this[i]&0x7fff;
- var h = this[i++]>>15;
- var m = xh*l+h*xl;
- l = xl*l+((m&0x7fff)<<15)+w[j]+(c&0x3fffffff);
- c = (l>>>30)+(m>>>15)+xh*h+(c>>>30);
- w[j++] = l&0x3fffffff;
- }
- return c;
- }
- // Alternately, set max digit bits to 28 since some
- // browsers slow down when dealing with 32-bit numbers.
- function am3(i,x,w,j,c,n) {
- var xl = x&0x3fff, xh = x>>14;
- while(--n >= 0) {
- var l = this[i]&0x3fff;
- var h = this[i++]>>14;
- var m = xh*l+h*xl;
- l = xl*l+((m&0x3fff)<<14)+w[j]+c;
- c = (l>>28)+(m>>14)+xh*h;
- w[j++] = l&0xfffffff;
- }
- return c;
- }
- var inBrowser = typeof navigator !== "undefined";
- if(inBrowser && j_lm && (navigator.appName == "Microsoft Internet Explorer")) {
- BigInteger.prototype.am = am2;
- dbits = 30;
- }
- else if(inBrowser && j_lm && (navigator.appName != "Netscape")) {
- BigInteger.prototype.am = am1;
- dbits = 26;
- }
- else { // Mozilla/Netscape seems to prefer am3
- BigInteger.prototype.am = am3;
- dbits = 28;
- }
-
- BigInteger.prototype.DB = dbits;
- BigInteger.prototype.DM = ((1<= 0; --i) r[i] = this[i];
- r.t = this.t;
- r.s = this.s;
- }
-
- // (protected) set from integer value x, -DV <= x < DV
- function bnpFromInt(x) {
- this.t = 1;
- this.s = (x<0)?-1:0;
- if(x > 0) this[0] = x;
- else if(x < -1) this[0] = x+this.DV;
- else this.t = 0;
- }
-
- // return bigint initialized to value
- function nbv(i) { var r = nbi(); r.fromInt(i); return r; }
-
- // (protected) set from string and radix
- function bnpFromString(s,b) {
- var k;
- if(b == 16) k = 4;
- else if(b == 8) k = 3;
- else if(b == 256) k = 8; // byte array
- else if(b == 2) k = 1;
- else if(b == 32) k = 5;
- else if(b == 4) k = 2;
- else { this.fromRadix(s,b); return; }
- this.t = 0;
- this.s = 0;
- var i = s.length, mi = false, sh = 0;
- while(--i >= 0) {
- var x = (k==8)?s[i]&0xff:intAt(s,i);
- if(x < 0) {
- if(s.charAt(i) == "-") mi = true;
- continue;
- }
- mi = false;
- if(sh == 0)
- this[this.t++] = x;
- else if(sh+k > this.DB) {
- this[this.t-1] |= (x&((1<<(this.DB-sh))-1))<>(this.DB-sh));
- }
- else
- this[this.t-1] |= x<= this.DB) sh -= this.DB;
- }
- if(k == 8 && (s[0]&0x80) != 0) {
- this.s = -1;
- if(sh > 0) this[this.t-1] |= ((1<<(this.DB-sh))-1)< 0 && this[this.t-1] == c) --this.t;
- }
-
- // (public) return string representation in given radix
- function bnToString(b) {
- if(this.s < 0) return "-"+this.negate().toString(b);
- var k;
- if(b == 16) k = 4;
- else if(b == 8) k = 3;
- else if(b == 2) k = 1;
- else if(b == 32) k = 5;
- else if(b == 4) k = 2;
- else return this.toRadix(b);
- var km = (1< 0) {
- if(p < this.DB && (d = this[i]>>p) > 0) { m = true; r = int2char(d); }
- while(i >= 0) {
- if(p < k) {
- d = (this[i]&((1<>(p+=this.DB-k);
- }
- else {
- d = (this[i]>>(p-=k))&km;
- if(p <= 0) { p += this.DB; --i; }
- }
- if(d > 0) m = true;
- if(m) r += int2char(d);
- }
- }
- return m?r:"0";
- }
-
- // (public) -this
- function bnNegate() { var r = nbi(); BigInteger.ZERO.subTo(this,r); return r; }
-
- // (public) |this|
- function bnAbs() { return (this.s<0)?this.negate():this; }
-
- // (public) return + if this > a, - if this < a, 0 if equal
- function bnCompareTo(a) {
- var r = this.s-a.s;
- if(r != 0) return r;
- var i = this.t;
- r = i-a.t;
- if(r != 0) return (this.s<0)?-r:r;
- while(--i >= 0) if((r=this[i]-a[i]) != 0) return r;
- return 0;
- }
-
- // returns bit length of the integer x
- function nbits(x) {
- var r = 1, t;
- if((t=x>>>16) != 0) { x = t; r += 16; }
- if((t=x>>8) != 0) { x = t; r += 8; }
- if((t=x>>4) != 0) { x = t; r += 4; }
- if((t=x>>2) != 0) { x = t; r += 2; }
- if((t=x>>1) != 0) { x = t; r += 1; }
- return r;
- }
-
- // (public) return the number of bits in "this"
- function bnBitLength() {
- if(this.t <= 0) return 0;
- return this.DB*(this.t-1)+nbits(this[this.t-1]^(this.s&this.DM));
- }
-
- // (protected) r = this << n*DB
- function bnpDLShiftTo(n,r) {
- var i;
- for(i = this.t-1; i >= 0; --i) r[i+n] = this[i];
- for(i = n-1; i >= 0; --i) r[i] = 0;
- r.t = this.t+n;
- r.s = this.s;
- }
-
- // (protected) r = this >> n*DB
- function bnpDRShiftTo(n,r) {
- for(var i = n; i < this.t; ++i) r[i-n] = this[i];
- r.t = Math.max(this.t-n,0);
- r.s = this.s;
- }
-
- // (protected) r = this << n
- function bnpLShiftTo(n,r) {
- var bs = n%this.DB;
- var cbs = this.DB-bs;
- var bm = (1<= 0; --i) {
- r[i+ds+1] = (this[i]>>cbs)|c;
- c = (this[i]&bm)<= 0; --i) r[i] = 0;
- r[ds] = c;
- r.t = this.t+ds+1;
- r.s = this.s;
- r.clamp();
- }
-
- // (protected) r = this >> n
- function bnpRShiftTo(n,r) {
- r.s = this.s;
- var ds = Math.floor(n/this.DB);
- if(ds >= this.t) { r.t = 0; return; }
- var bs = n%this.DB;
- var cbs = this.DB-bs;
- var bm = (1<>bs;
- for(var i = ds+1; i < this.t; ++i) {
- r[i-ds-1] |= (this[i]&bm)<>bs;
- }
- if(bs > 0) r[this.t-ds-1] |= (this.s&bm)<>= this.DB;
- }
- if(a.t < this.t) {
- c -= a.s;
- while(i < this.t) {
- c += this[i];
- r[i++] = c&this.DM;
- c >>= this.DB;
- }
- c += this.s;
- }
- else {
- c += this.s;
- while(i < a.t) {
- c -= a[i];
- r[i++] = c&this.DM;
- c >>= this.DB;
- }
- c -= a.s;
- }
- r.s = (c<0)?-1:0;
- if(c < -1) r[i++] = this.DV+c;
- else if(c > 0) r[i++] = c;
- r.t = i;
- r.clamp();
- }
-
- // (protected) r = this * a, r != this,a (HAC 14.12)
- // "this" should be the larger one if appropriate.
- function bnpMultiplyTo(a,r) {
- var x = this.abs(), y = a.abs();
- var i = x.t;
- r.t = i+y.t;
- while(--i >= 0) r[i] = 0;
- for(i = 0; i < y.t; ++i) r[i+x.t] = x.am(0,y[i],r,i,0,x.t);
- r.s = 0;
- r.clamp();
- if(this.s != a.s) BigInteger.ZERO.subTo(r,r);
- }
-
- // (protected) r = this^2, r != this (HAC 14.16)
- function bnpSquareTo(r) {
- var x = this.abs();
- var i = r.t = 2*x.t;
- while(--i >= 0) r[i] = 0;
- for(i = 0; i < x.t-1; ++i) {
- var c = x.am(i,x[i],r,2*i,0,1);
- if((r[i+x.t]+=x.am(i+1,2*x[i],r,2*i+1,c,x.t-i-1)) >= x.DV) {
- r[i+x.t] -= x.DV;
- r[i+x.t+1] = 1;
- }
- }
- if(r.t > 0) r[r.t-1] += x.am(i,x[i],r,2*i,0,1);
- r.s = 0;
- r.clamp();
- }
-
- // (protected) divide this by m, quotient and remainder to q, r (HAC 14.20)
- // r != q, this != m. q or r may be null.
- function bnpDivRemTo(m,q,r) {
- var pm = m.abs();
- if(pm.t <= 0) return;
- var pt = this.abs();
- if(pt.t < pm.t) {
- if(q != null) q.fromInt(0);
- if(r != null) this.copyTo(r);
- return;
- }
- if(r == null) r = nbi();
- var y = nbi(), ts = this.s, ms = m.s;
- var nsh = this.DB-nbits(pm[pm.t-1]); // normalize modulus
- if(nsh > 0) { pm.lShiftTo(nsh,y); pt.lShiftTo(nsh,r); }
- else { pm.copyTo(y); pt.copyTo(r); }
- var ys = y.t;
- var y0 = y[ys-1];
- if(y0 == 0) return;
- var yt = y0*(1<1)?y[ys-2]>>this.F2:0);
- var d1 = this.FV/yt, d2 = (1<= 0) {
- r[r.t++] = 1;
- r.subTo(t,r);
- }
- BigInteger.ONE.dlShiftTo(ys,t);
- t.subTo(y,y); // "negative" y so we can replace sub with am later
- while(y.t < ys) y[y.t++] = 0;
- while(--j >= 0) {
- // Estimate quotient digit
- var qd = (r[--i]==y0)?this.DM:Math.floor(r[i]*d1+(r[i-1]+e)*d2);
- if((r[i]+=y.am(0,qd,r,j,0,ys)) < qd) { // Try it out
- y.dlShiftTo(j,t);
- r.subTo(t,r);
- while(r[i] < --qd) r.subTo(t,r);
- }
- }
- if(q != null) {
- r.drShiftTo(ys,q);
- if(ts != ms) BigInteger.ZERO.subTo(q,q);
- }
- r.t = ys;
- r.clamp();
- if(nsh > 0) r.rShiftTo(nsh,r); // Denormalize remainder
- if(ts < 0) BigInteger.ZERO.subTo(r,r);
- }
-
- // (public) this mod a
- function bnMod(a) {
- var r = nbi();
- this.abs().divRemTo(a,null,r);
- if(this.s < 0 && r.compareTo(BigInteger.ZERO) > 0) a.subTo(r,r);
- return r;
- }
-
- // Modular reduction using "classic" algorithm
- function Classic(m) { this.m = m; }
- function cConvert(x) {
- if(x.s < 0 || x.compareTo(this.m) >= 0) return x.mod(this.m);
- else return x;
- }
- function cRevert(x) { return x; }
- function cReduce(x) { x.divRemTo(this.m,null,x); }
- function cMulTo(x,y,r) { x.multiplyTo(y,r); this.reduce(r); }
- function cSqrTo(x,r) { x.squareTo(r); this.reduce(r); }
-
- Classic.prototype.convert = cConvert;
- Classic.prototype.revert = cRevert;
- Classic.prototype.reduce = cReduce;
- Classic.prototype.mulTo = cMulTo;
- Classic.prototype.sqrTo = cSqrTo;
-
- // (protected) return "-1/this % 2^DB"; useful for Mont. reduction
- // justification:
- // xy == 1 (mod m)
- // xy = 1+km
- // xy(2-xy) = (1+km)(1-km)
- // x[y(2-xy)] = 1-k^2m^2
- // x[y(2-xy)] == 1 (mod m^2)
- // if y is 1/x mod m, then y(2-xy) is 1/x mod m^2
- // should reduce x and y(2-xy) by m^2 at each step to keep size bounded.
- // JS multiply "overflows" differently from C/C++, so care is needed here.
- function bnpInvDigit() {
- if(this.t < 1) return 0;
- var x = this[0];
- if((x&1) == 0) return 0;
- var y = x&3; // y == 1/x mod 2^2
- y = (y*(2-(x&0xf)*y))&0xf; // y == 1/x mod 2^4
- y = (y*(2-(x&0xff)*y))&0xff; // y == 1/x mod 2^8
- y = (y*(2-(((x&0xffff)*y)&0xffff)))&0xffff; // y == 1/x mod 2^16
- // last step - calculate inverse mod DV directly;
- // assumes 16 < DB <= 32 and assumes ability to handle 48-bit ints
- y = (y*(2-x*y%this.DV))%this.DV; // y == 1/x mod 2^dbits
- // we really want the negative inverse, and -DV < y < DV
- return (y>0)?this.DV-y:-y;
- }
-
- // Montgomery reduction
- function Montgomery(m) {
- this.m = m;
- this.mp = m.invDigit();
- this.mpl = this.mp&0x7fff;
- this.mph = this.mp>>15;
- this.um = (1<<(m.DB-15))-1;
- this.mt2 = 2*m.t;
- }
-
- // xR mod m
- function montConvert(x) {
- var r = nbi();
- x.abs().dlShiftTo(this.m.t,r);
- r.divRemTo(this.m,null,r);
- if(x.s < 0 && r.compareTo(BigInteger.ZERO) > 0) this.m.subTo(r,r);
- return r;
- }
-
- // x/R mod m
- function montRevert(x) {
- var r = nbi();
- x.copyTo(r);
- this.reduce(r);
- return r;
- }
-
- // x = x/R mod m (HAC 14.32)
- function montReduce(x) {
- while(x.t <= this.mt2) // pad x so am has enough room later
- x[x.t++] = 0;
- for(var i = 0; i < this.m.t; ++i) {
- // faster way of calculating u0 = x[i]*mp mod DV
- var j = x[i]&0x7fff;
- var u0 = (j*this.mpl+(((j*this.mph+(x[i]>>15)*this.mpl)&this.um)<<15))&x.DM;
- // use am to combine the multiply-shift-add into one call
- j = i+this.m.t;
- x[j] += this.m.am(0,u0,x,i,0,this.m.t);
- // propagate carry
- while(x[j] >= x.DV) { x[j] -= x.DV; x[++j]++; }
- }
- x.clamp();
- x.drShiftTo(this.m.t,x);
- if(x.compareTo(this.m) >= 0) x.subTo(this.m,x);
- }
-
- // r = "x^2/R mod m"; x != r
- function montSqrTo(x,r) { x.squareTo(r); this.reduce(r); }
-
- // r = "xy/R mod m"; x,y != r
- function montMulTo(x,y,r) { x.multiplyTo(y,r); this.reduce(r); }
-
- Montgomery.prototype.convert = montConvert;
- Montgomery.prototype.revert = montRevert;
- Montgomery.prototype.reduce = montReduce;
- Montgomery.prototype.mulTo = montMulTo;
- Montgomery.prototype.sqrTo = montSqrTo;
-
- // (protected) true iff this is even
- function bnpIsEven() { return ((this.t>0)?(this[0]&1):this.s) == 0; }
-
- // (protected) this^e, e < 2^32, doing sqr and mul with "r" (HAC 14.79)
- function bnpExp(e,z) {
- if(e > 0xffffffff || e < 1) return BigInteger.ONE;
- var r = nbi(), r2 = nbi(), g = z.convert(this), i = nbits(e)-1;
- g.copyTo(r);
- while(--i >= 0) {
- z.sqrTo(r,r2);
- if((e&(1< 0) z.mulTo(r2,g,r);
- else { var t = r; r = r2; r2 = t; }
- }
- return z.revert(r);
- }
-
- // (public) this^e % m, 0 <= e < 2^32
- function bnModPowInt(e,m) {
- var z;
- if(e < 256 || m.isEven()) z = new Classic(m); else z = new Montgomery(m);
- return this.exp(e,z);
- }
-
- // protected
- BigInteger.prototype.copyTo = bnpCopyTo;
- BigInteger.prototype.fromInt = bnpFromInt;
- BigInteger.prototype.fromString = bnpFromString;
- BigInteger.prototype.clamp = bnpClamp;
- BigInteger.prototype.dlShiftTo = bnpDLShiftTo;
- BigInteger.prototype.drShiftTo = bnpDRShiftTo;
- BigInteger.prototype.lShiftTo = bnpLShiftTo;
- BigInteger.prototype.rShiftTo = bnpRShiftTo;
- BigInteger.prototype.subTo = bnpSubTo;
- BigInteger.prototype.multiplyTo = bnpMultiplyTo;
- BigInteger.prototype.squareTo = bnpSquareTo;
- BigInteger.prototype.divRemTo = bnpDivRemTo;
- BigInteger.prototype.invDigit = bnpInvDigit;
- BigInteger.prototype.isEven = bnpIsEven;
- BigInteger.prototype.exp = bnpExp;
-
- // public
- BigInteger.prototype.toString = bnToString;
- BigInteger.prototype.negate = bnNegate;
- BigInteger.prototype.abs = bnAbs;
- BigInteger.prototype.compareTo = bnCompareTo;
- BigInteger.prototype.bitLength = bnBitLength;
- BigInteger.prototype.mod = bnMod;
- BigInteger.prototype.modPowInt = bnModPowInt;
-
- // "constants"
- BigInteger.ZERO = nbv(0);
- BigInteger.ONE = nbv(1);
-
- // Copyright (c) 2005-2009 Tom Wu
- // All Rights Reserved.
- // See "LICENSE" for details.
-
- // Extended JavaScript BN functions, required for RSA private ops.
-
- // Version 1.1: new BigInteger("0", 10) returns "proper" zero
- // Version 1.2: square() API, isProbablePrime fix
-
- // (public)
- function bnClone() { var r = nbi(); this.copyTo(r); return r; }
-
- // (public) return value as integer
- function bnIntValue() {
- if(this.s < 0) {
- if(this.t == 1) return this[0]-this.DV;
- else if(this.t == 0) return -1;
- }
- else if(this.t == 1) return this[0];
- else if(this.t == 0) return 0;
- // assumes 16 < DB < 32
- return ((this[1]&((1<<(32-this.DB))-1))<>24; }
-
- // (public) return value as short (assumes DB>=16)
- function bnShortValue() { return (this.t==0)?this.s:(this[0]<<16)>>16; }
-
- // (protected) return x s.t. r^x < DV
- function bnpChunkSize(r) { return Math.floor(Math.LN2*this.DB/Math.log(r)); }
-
- // (public) 0 if this == 0, 1 if this > 0
- function bnSigNum() {
- if(this.s < 0) return -1;
- else if(this.t <= 0 || (this.t == 1 && this[0] <= 0)) return 0;
- else return 1;
- }
-
- // (protected) convert to radix string
- function bnpToRadix(b) {
- if(b == null) b = 10;
- if(this.signum() == 0 || b < 2 || b > 36) return "0";
- var cs = this.chunkSize(b);
- var a = Math.pow(b,cs);
- var d = nbv(a), y = nbi(), z = nbi(), r = "";
- this.divRemTo(d,y,z);
- while(y.signum() > 0) {
- r = (a+z.intValue()).toString(b).substr(1) + r;
- y.divRemTo(d,y,z);
- }
- return z.intValue().toString(b) + r;
- }
-
- // (protected) convert from radix string
- function bnpFromRadix(s,b) {
- this.fromInt(0);
- if(b == null) b = 10;
- var cs = this.chunkSize(b);
- var d = Math.pow(b,cs), mi = false, j = 0, w = 0;
- for(var i = 0; i < s.length; ++i) {
- var x = intAt(s,i);
- if(x < 0) {
- if(s.charAt(i) == "-" && this.signum() == 0) mi = true;
- continue;
- }
- w = b*w+x;
- if(++j >= cs) {
- this.dMultiply(d);
- this.dAddOffset(w,0);
- j = 0;
- w = 0;
- }
- }
- if(j > 0) {
- this.dMultiply(Math.pow(b,j));
- this.dAddOffset(w,0);
- }
- if(mi) BigInteger.ZERO.subTo(this,this);
- }
-
- // (protected) alternate constructor
- function bnpFromNumber(a,b,c) {
- if("number" == typeof b) {
- // new BigInteger(int,int,RNG)
- if(a < 2) this.fromInt(1);
- else {
- this.fromNumber(a,c);
- if(!this.testBit(a-1)) // force MSB set
- this.bitwiseTo(BigInteger.ONE.shiftLeft(a-1),op_or,this);
- if(this.isEven()) this.dAddOffset(1,0); // force odd
- while(!this.isProbablePrime(b)) {
- this.dAddOffset(2,0);
- if(this.bitLength() > a) this.subTo(BigInteger.ONE.shiftLeft(a-1),this);
- }
- }
- }
- else {
- // new BigInteger(int,RNG)
- var x = new Array(), t = a&7;
- x.length = (a>>3)+1;
- b.nextBytes(x);
- if(t > 0) x[0] &= ((1< 0) {
- if(p < this.DB && (d = this[i]>>p) != (this.s&this.DM)>>p)
- r[k++] = d|(this.s<<(this.DB-p));
- while(i >= 0) {
- if(p < 8) {
- d = (this[i]&((1<>(p+=this.DB-8);
- }
- else {
- d = (this[i]>>(p-=8))&0xff;
- if(p <= 0) { p += this.DB; --i; }
- }
- if((d&0x80) != 0) d |= -256;
- if(k == 0 && (this.s&0x80) != (d&0x80)) ++k;
- if(k > 0 || d != this.s) r[k++] = d;
- }
- }
- return r;
- }
-
- function bnEquals(a) { return(this.compareTo(a)==0); }
- function bnMin(a) { return(this.compareTo(a)<0)?this:a; }
- function bnMax(a) { return(this.compareTo(a)>0)?this:a; }
-
- // (protected) r = this op a (bitwise)
- function bnpBitwiseTo(a,op,r) {
- var i, f, m = Math.min(a.t,this.t);
- for(i = 0; i < m; ++i) r[i] = op(this[i],a[i]);
- if(a.t < this.t) {
- f = a.s&this.DM;
- for(i = m; i < this.t; ++i) r[i] = op(this[i],f);
- r.t = this.t;
- }
- else {
- f = this.s&this.DM;
- for(i = m; i < a.t; ++i) r[i] = op(f,a[i]);
- r.t = a.t;
- }
- r.s = op(this.s,a.s);
- r.clamp();
- }
-
- // (public) this & a
- function op_and(x,y) { return x&y; }
- function bnAnd(a) { var r = nbi(); this.bitwiseTo(a,op_and,r); return r; }
-
- // (public) this | a
- function op_or(x,y) { return x|y; }
- function bnOr(a) { var r = nbi(); this.bitwiseTo(a,op_or,r); return r; }
-
- // (public) this ^ a
- function op_xor(x,y) { return x^y; }
- function bnXor(a) { var r = nbi(); this.bitwiseTo(a,op_xor,r); return r; }
-
- // (public) this & ~a
- function op_andnot(x,y) { return x&~y; }
- function bnAndNot(a) { var r = nbi(); this.bitwiseTo(a,op_andnot,r); return r; }
-
- // (public) ~this
- function bnNot() {
- var r = nbi();
- for(var i = 0; i < this.t; ++i) r[i] = this.DM&~this[i];
- r.t = this.t;
- r.s = ~this.s;
- return r;
- }
-
- // (public) this << n
- function bnShiftLeft(n) {
- var r = nbi();
- if(n < 0) this.rShiftTo(-n,r); else this.lShiftTo(n,r);
- return r;
- }
-
- // (public) this >> n
- function bnShiftRight(n) {
- var r = nbi();
- if(n < 0) this.lShiftTo(-n,r); else this.rShiftTo(n,r);
- return r;
- }
-
- // return index of lowest 1-bit in x, x < 2^31
- function lbit(x) {
- if(x == 0) return -1;
- var r = 0;
- if((x&0xffff) == 0) { x >>= 16; r += 16; }
- if((x&0xff) == 0) { x >>= 8; r += 8; }
- if((x&0xf) == 0) { x >>= 4; r += 4; }
- if((x&3) == 0) { x >>= 2; r += 2; }
- if((x&1) == 0) ++r;
- return r;
- }
-
- // (public) returns index of lowest 1-bit (or -1 if none)
- function bnGetLowestSetBit() {
- for(var i = 0; i < this.t; ++i)
- if(this[i] != 0) return i*this.DB+lbit(this[i]);
- if(this.s < 0) return this.t*this.DB;
- return -1;
- }
-
- // return number of 1 bits in x
- function cbit(x) {
- var r = 0;
- while(x != 0) { x &= x-1; ++r; }
- return r;
- }
-
- // (public) return number of set bits
- function bnBitCount() {
- var r = 0, x = this.s&this.DM;
- for(var i = 0; i < this.t; ++i) r += cbit(this[i]^x);
- return r;
- }
-
- // (public) true iff nth bit is set
- function bnTestBit(n) {
- var j = Math.floor(n/this.DB);
- if(j >= this.t) return(this.s!=0);
- return((this[j]&(1<<(n%this.DB)))!=0);
- }
-
- // (protected) this op (1<>= this.DB;
- }
- if(a.t < this.t) {
- c += a.s;
- while(i < this.t) {
- c += this[i];
- r[i++] = c&this.DM;
- c >>= this.DB;
- }
- c += this.s;
- }
- else {
- c += this.s;
- while(i < a.t) {
- c += a[i];
- r[i++] = c&this.DM;
- c >>= this.DB;
- }
- c += a.s;
- }
- r.s = (c<0)?-1:0;
- if(c > 0) r[i++] = c;
- else if(c < -1) r[i++] = this.DV+c;
- r.t = i;
- r.clamp();
- }
-
- // (public) this + a
- function bnAdd(a) { var r = nbi(); this.addTo(a,r); return r; }
-
- // (public) this - a
- function bnSubtract(a) { var r = nbi(); this.subTo(a,r); return r; }
-
- // (public) this * a
- function bnMultiply(a) { var r = nbi(); this.multiplyTo(a,r); return r; }
-
- // (public) this^2
- function bnSquare() { var r = nbi(); this.squareTo(r); return r; }
-
- // (public) this / a
- function bnDivide(a) { var r = nbi(); this.divRemTo(a,r,null); return r; }
-
- // (public) this % a
- function bnRemainder(a) { var r = nbi(); this.divRemTo(a,null,r); return r; }
-
- // (public) [this/a,this%a]
- function bnDivideAndRemainder(a) {
- var q = nbi(), r = nbi();
- this.divRemTo(a,q,r);
- return new Array(q,r);
- }
-
- // (protected) this *= n, this >= 0, 1 < n < DV
- function bnpDMultiply(n) {
- this[this.t] = this.am(0,n-1,this,0,0,this.t);
- ++this.t;
- this.clamp();
- }
-
- // (protected) this += n << w words, this >= 0
- function bnpDAddOffset(n,w) {
- if(n == 0) return;
- while(this.t <= w) this[this.t++] = 0;
- this[w] += n;
- while(this[w] >= this.DV) {
- this[w] -= this.DV;
- if(++w >= this.t) this[this.t++] = 0;
- ++this[w];
- }
- }
-
- // A "null" reducer
- function NullExp() {}
- function nNop(x) { return x; }
- function nMulTo(x,y,r) { x.multiplyTo(y,r); }
- function nSqrTo(x,r) { x.squareTo(r); }
-
- NullExp.prototype.convert = nNop;
- NullExp.prototype.revert = nNop;
- NullExp.prototype.mulTo = nMulTo;
- NullExp.prototype.sqrTo = nSqrTo;
-
- // (public) this^e
- function bnPow(e) { return this.exp(e,new NullExp()); }
-
- // (protected) r = lower n words of "this * a", a.t <= n
- // "this" should be the larger one if appropriate.
- function bnpMultiplyLowerTo(a,n,r) {
- var i = Math.min(this.t+a.t,n);
- r.s = 0; // assumes a,this >= 0
- r.t = i;
- while(i > 0) r[--i] = 0;
- var j;
- for(j = r.t-this.t; i < j; ++i) r[i+this.t] = this.am(0,a[i],r,i,0,this.t);
- for(j = Math.min(a.t,n); i < j; ++i) this.am(0,a[i],r,i,0,n-i);
- r.clamp();
- }
-
- // (protected) r = "this * a" without lower n words, n > 0
- // "this" should be the larger one if appropriate.
- function bnpMultiplyUpperTo(a,n,r) {
- --n;
- var i = r.t = this.t+a.t-n;
- r.s = 0; // assumes a,this >= 0
- while(--i >= 0) r[i] = 0;
- for(i = Math.max(n-this.t,0); i < a.t; ++i)
- r[this.t+i-n] = this.am(n-i,a[i],r,0,0,this.t+i-n);
- r.clamp();
- r.drShiftTo(1,r);
- }
-
- // Barrett modular reduction
- function Barrett(m) {
- // setup Barrett
- this.r2 = nbi();
- this.q3 = nbi();
- BigInteger.ONE.dlShiftTo(2*m.t,this.r2);
- this.mu = this.r2.divide(m);
- this.m = m;
- }
-
- function barrettConvert(x) {
- if(x.s < 0 || x.t > 2*this.m.t) return x.mod(this.m);
- else if(x.compareTo(this.m) < 0) return x;
- else { var r = nbi(); x.copyTo(r); this.reduce(r); return r; }
- }
-
- function barrettRevert(x) { return x; }
-
- // x = x mod m (HAC 14.42)
- function barrettReduce(x) {
- x.drShiftTo(this.m.t-1,this.r2);
- if(x.t > this.m.t+1) { x.t = this.m.t+1; x.clamp(); }
- this.mu.multiplyUpperTo(this.r2,this.m.t+1,this.q3);
- this.m.multiplyLowerTo(this.q3,this.m.t+1,this.r2);
- while(x.compareTo(this.r2) < 0) x.dAddOffset(1,this.m.t+1);
- x.subTo(this.r2,x);
- while(x.compareTo(this.m) >= 0) x.subTo(this.m,x);
- }
-
- // r = x^2 mod m; x != r
- function barrettSqrTo(x,r) { x.squareTo(r); this.reduce(r); }
-
- // r = x*y mod m; x,y != r
- function barrettMulTo(x,y,r) { x.multiplyTo(y,r); this.reduce(r); }
-
- Barrett.prototype.convert = barrettConvert;
- Barrett.prototype.revert = barrettRevert;
- Barrett.prototype.reduce = barrettReduce;
- Barrett.prototype.mulTo = barrettMulTo;
- Barrett.prototype.sqrTo = barrettSqrTo;
-
- // (public) this^e % m (HAC 14.85)
- function bnModPow(e,m) {
- var i = e.bitLength(), k, r = nbv(1), z;
- if(i <= 0) return r;
- else if(i < 18) k = 1;
- else if(i < 48) k = 3;
- else if(i < 144) k = 4;
- else if(i < 768) k = 5;
- else k = 6;
- if(i < 8)
- z = new Classic(m);
- else if(m.isEven())
- z = new Barrett(m);
- else
- z = new Montgomery(m);
-
- // precomputation
- var g = new Array(), n = 3, k1 = k-1, km = (1< 1) {
- var g2 = nbi();
- z.sqrTo(g[1],g2);
- while(n <= km) {
- g[n] = nbi();
- z.mulTo(g2,g[n-2],g[n]);
- n += 2;
- }
- }
-
- var j = e.t-1, w, is1 = true, r2 = nbi(), t;
- i = nbits(e[j])-1;
- while(j >= 0) {
- if(i >= k1) w = (e[j]>>(i-k1))&km;
- else {
- w = (e[j]&((1<<(i+1))-1))<<(k1-i);
- if(j > 0) w |= e[j-1]>>(this.DB+i-k1);
- }
-
- n = k;
- while((w&1) == 0) { w >>= 1; --n; }
- if((i -= n) < 0) { i += this.DB; --j; }
- if(is1) { // ret == 1, don't bother squaring or multiplying it
- g[w].copyTo(r);
- is1 = false;
- }
- else {
- while(n > 1) { z.sqrTo(r,r2); z.sqrTo(r2,r); n -= 2; }
- if(n > 0) z.sqrTo(r,r2); else { t = r; r = r2; r2 = t; }
- z.mulTo(r2,g[w],r);
- }
-
- while(j >= 0 && (e[j]&(1< 0) {
- x.rShiftTo(g,x);
- y.rShiftTo(g,y);
- }
- while(x.signum() > 0) {
- if((i = x.getLowestSetBit()) > 0) x.rShiftTo(i,x);
- if((i = y.getLowestSetBit()) > 0) y.rShiftTo(i,y);
- if(x.compareTo(y) >= 0) {
- x.subTo(y,x);
- x.rShiftTo(1,x);
- }
- else {
- y.subTo(x,y);
- y.rShiftTo(1,y);
- }
- }
- if(g > 0) y.lShiftTo(g,y);
- return y;
- }
-
- // (protected) this % n, n < 2^26
- function bnpModInt(n) {
- if(n <= 0) return 0;
- var d = this.DV%n, r = (this.s<0)?n-1:0;
- if(this.t > 0)
- if(d == 0) r = this[0]%n;
- else for(var i = this.t-1; i >= 0; --i) r = (d*r+this[i])%n;
- return r;
- }
-
- // (public) 1/this % m (HAC 14.61)
- function bnModInverse(m) {
- var ac = m.isEven();
- if((this.isEven() && ac) || m.signum() == 0) return BigInteger.ZERO;
- var u = m.clone(), v = this.clone();
- var a = nbv(1), b = nbv(0), c = nbv(0), d = nbv(1);
- while(u.signum() != 0) {
- while(u.isEven()) {
- u.rShiftTo(1,u);
- if(ac) {
- if(!a.isEven() || !b.isEven()) { a.addTo(this,a); b.subTo(m,b); }
- a.rShiftTo(1,a);
- }
- else if(!b.isEven()) b.subTo(m,b);
- b.rShiftTo(1,b);
- }
- while(v.isEven()) {
- v.rShiftTo(1,v);
- if(ac) {
- if(!c.isEven() || !d.isEven()) { c.addTo(this,c); d.subTo(m,d); }
- c.rShiftTo(1,c);
- }
- else if(!d.isEven()) d.subTo(m,d);
- d.rShiftTo(1,d);
- }
- if(u.compareTo(v) >= 0) {
- u.subTo(v,u);
- if(ac) a.subTo(c,a);
- b.subTo(d,b);
- }
- else {
- v.subTo(u,v);
- if(ac) c.subTo(a,c);
- d.subTo(b,d);
- }
- }
- if(v.compareTo(BigInteger.ONE) != 0) return BigInteger.ZERO;
- if(d.compareTo(m) >= 0) return d.subtract(m);
- if(d.signum() < 0) d.addTo(m,d); else return d;
- if(d.signum() < 0) return d.add(m); else return d;
- }
-
- var lowprimes = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277,281,283,293,307,311,313,317,331,337,347,349,353,359,367,373,379,383,389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,491,499,503,509,521,523,541,547,557,563,569,571,577,587,593,599,601,607,613,617,619,631,641,643,647,653,659,661,673,677,683,691,701,709,719,727,733,739,743,751,757,761,769,773,787,797,809,811,821,823,827,829,839,853,857,859,863,877,881,883,887,907,911,919,929,937,941,947,953,967,971,977,983,991,997];
- var lplim = (1<<26)/lowprimes[lowprimes.length-1];
-
- // (public) test primality with certainty >= 1-.5^t
- function bnIsProbablePrime(t) {
- var i, x = this.abs();
- if(x.t == 1 && x[0] <= lowprimes[lowprimes.length-1]) {
- for(i = 0; i < lowprimes.length; ++i)
- if(x[0] == lowprimes[i]) return true;
- return false;
- }
- if(x.isEven()) return false;
- i = 1;
- while(i < lowprimes.length) {
- var m = lowprimes[i], j = i+1;
- while(j < lowprimes.length && m < lplim) m *= lowprimes[j++];
- m = x.modInt(m);
- while(i < j) if(m%lowprimes[i++] == 0) return false;
- }
- return x.millerRabin(t);
- }
-
- // (protected) true if probably prime (HAC 4.24, Miller-Rabin)
- function bnpMillerRabin(t) {
- var n1 = this.subtract(BigInteger.ONE);
- var k = n1.getLowestSetBit();
- if(k <= 0) return false;
- var r = n1.shiftRight(k);
- t = (t+1)>>1;
- if(t > lowprimes.length) t = lowprimes.length;
- var a = nbi();
- for(var i = 0; i < t; ++i) {
- //Pick bases at random, instead of starting at 2
- a.fromInt(lowprimes[Math.floor(Math.random()*lowprimes.length)]);
- var y = a.modPow(r,this);
- if(y.compareTo(BigInteger.ONE) != 0 && y.compareTo(n1) != 0) {
- var j = 1;
- while(j++ < k && y.compareTo(n1) != 0) {
- y = y.modPowInt(2,this);
- if(y.compareTo(BigInteger.ONE) == 0) return false;
- }
- if(y.compareTo(n1) != 0) return false;
- }
- }
- return true;
- }
-
- // protected
- BigInteger.prototype.chunkSize = bnpChunkSize;
- BigInteger.prototype.toRadix = bnpToRadix;
- BigInteger.prototype.fromRadix = bnpFromRadix;
- BigInteger.prototype.fromNumber = bnpFromNumber;
- BigInteger.prototype.bitwiseTo = bnpBitwiseTo;
- BigInteger.prototype.changeBit = bnpChangeBit;
- BigInteger.prototype.addTo = bnpAddTo;
- BigInteger.prototype.dMultiply = bnpDMultiply;
- BigInteger.prototype.dAddOffset = bnpDAddOffset;
- BigInteger.prototype.multiplyLowerTo = bnpMultiplyLowerTo;
- BigInteger.prototype.multiplyUpperTo = bnpMultiplyUpperTo;
- BigInteger.prototype.modInt = bnpModInt;
- BigInteger.prototype.millerRabin = bnpMillerRabin;
-
- // public
- BigInteger.prototype.clone = bnClone;
- BigInteger.prototype.intValue = bnIntValue;
- BigInteger.prototype.byteValue = bnByteValue;
- BigInteger.prototype.shortValue = bnShortValue;
- BigInteger.prototype.signum = bnSigNum;
- BigInteger.prototype.toByteArray = bnToByteArray;
- BigInteger.prototype.equals = bnEquals;
- BigInteger.prototype.min = bnMin;
- BigInteger.prototype.max = bnMax;
- BigInteger.prototype.and = bnAnd;
- BigInteger.prototype.or = bnOr;
- BigInteger.prototype.xor = bnXor;
- BigInteger.prototype.andNot = bnAndNot;
- BigInteger.prototype.not = bnNot;
- BigInteger.prototype.shiftLeft = bnShiftLeft;
- BigInteger.prototype.shiftRight = bnShiftRight;
- BigInteger.prototype.getLowestSetBit = bnGetLowestSetBit;
- BigInteger.prototype.bitCount = bnBitCount;
- BigInteger.prototype.testBit = bnTestBit;
- BigInteger.prototype.setBit = bnSetBit;
- BigInteger.prototype.clearBit = bnClearBit;
- BigInteger.prototype.flipBit = bnFlipBit;
- BigInteger.prototype.add = bnAdd;
- BigInteger.prototype.subtract = bnSubtract;
- BigInteger.prototype.multiply = bnMultiply;
- BigInteger.prototype.divide = bnDivide;
- BigInteger.prototype.remainder = bnRemainder;
- BigInteger.prototype.divideAndRemainder = bnDivideAndRemainder;
- BigInteger.prototype.modPow = bnModPow;
- BigInteger.prototype.modInverse = bnModInverse;
- BigInteger.prototype.pow = bnPow;
- BigInteger.prototype.gcd = bnGCD;
- BigInteger.prototype.isProbablePrime = bnIsProbablePrime;
-
- // JSBN-specific extension
- BigInteger.prototype.square = bnSquare;
-
- // Expose the Barrett function
- BigInteger.prototype.Barrett = Barrett
-
- // BigInteger interfaces not implemented in jsbn:
-
- // BigInteger(int signum, byte[] magnitude)
- // double doubleValue()
- // float floatValue()
- // int hashCode()
- // long longValue()
- // static BigInteger valueOf(long val)
-
- // Random number generator - requires a PRNG backend, e.g. prng4.js
-
- // For best results, put code like
- //
- // in your main HTML document.
-
- var rng_state;
- var rng_pool;
- var rng_pptr;
-
- // Mix in a 32-bit integer into the pool
- function rng_seed_int(x) {
- rng_pool[rng_pptr++] ^= x & 255;
- rng_pool[rng_pptr++] ^= (x >> 8) & 255;
- rng_pool[rng_pptr++] ^= (x >> 16) & 255;
- rng_pool[rng_pptr++] ^= (x >> 24) & 255;
- if(rng_pptr >= rng_psize) rng_pptr -= rng_psize;
- }
-
- // Mix in the current time (w/milliseconds) into the pool
- function rng_seed_time() {
- rng_seed_int(new Date().getTime());
- }
-
- // Initialize the pool with junk if needed.
- if(rng_pool == null) {
- rng_pool = new Array();
- rng_pptr = 0;
- var t;
- if(typeof window !== "undefined" && window.crypto) {
- if (window.crypto.getRandomValues) {
- // Use webcrypto if available
- var ua = new Uint8Array(32);
- window.crypto.getRandomValues(ua);
- for(t = 0; t < 32; ++t)
- rng_pool[rng_pptr++] = ua[t];
- }
- else if(navigator.appName == "Netscape" && navigator.appVersion < "5") {
- // Extract entropy (256 bits) from NS4 RNG if available
- var z = window.crypto.random(32);
- for(t = 0; t < z.length; ++t)
- rng_pool[rng_pptr++] = z.charCodeAt(t) & 255;
- }
- }
- while(rng_pptr < rng_psize) { // extract some randomness from Math.random()
- t = Math.floor(65536 * Math.random());
- rng_pool[rng_pptr++] = t >>> 8;
- rng_pool[rng_pptr++] = t & 255;
- }
- rng_pptr = 0;
- rng_seed_time();
- //rng_seed_int(window.screenX);
- //rng_seed_int(window.screenY);
- }
-
- function rng_get_byte() {
- if(rng_state == null) {
- rng_seed_time();
- rng_state = prng_newstate();
- rng_state.init(rng_pool);
- for(rng_pptr = 0; rng_pptr < rng_pool.length; ++rng_pptr)
- rng_pool[rng_pptr] = 0;
- rng_pptr = 0;
- //rng_pool = null;
- }
- // TODO: allow reseeding after first request
- return rng_state.next();
- }
-
- function rng_get_bytes(ba) {
- var i;
- for(i = 0; i < ba.length; ++i) ba[i] = rng_get_byte();
- }
-
- function SecureRandom() {}
-
- SecureRandom.prototype.nextBytes = rng_get_bytes;
-
- // prng4.js - uses Arcfour as a PRNG
-
- function Arcfour() {
- this.i = 0;
- this.j = 0;
- this.S = new Array();
- }
-
- // Initialize arcfour context from key, an array of ints, each from [0..255]
- function ARC4init(key) {
- var i, j, t;
- for(i = 0; i < 256; ++i)
- this.S[i] = i;
- j = 0;
- for(i = 0; i < 256; ++i) {
- j = (j + this.S[i] + key[i % key.length]) & 255;
- t = this.S[i];
- this.S[i] = this.S[j];
- this.S[j] = t;
- }
- this.i = 0;
- this.j = 0;
- }
-
- function ARC4next() {
- var t;
- this.i = (this.i + 1) & 255;
- this.j = (this.j + this.S[this.i]) & 255;
- t = this.S[this.i];
- this.S[this.i] = this.S[this.j];
- this.S[this.j] = t;
- return this.S[(t + this.S[this.i]) & 255];
- }
-
- Arcfour.prototype.init = ARC4init;
- Arcfour.prototype.next = ARC4next;
-
- // Plug in your RNG constructor here
- function prng_newstate() {
- return new Arcfour();
- }
-
- // Pool size must be a multiple of 4 and greater than 32.
- // An array of bytes the size of the pool will be passed to init()
- var rng_psize = 256;
-
- if (typeof exports !== 'undefined') {
- exports = module.exports = {
- BigInteger: BigInteger,
- SecureRandom: SecureRandom,
- };
- } else {
- this.BigInteger = BigInteger;
- this.SecureRandom = SecureRandom;
- }
-
-}).call(this);
-
-},{}],65:[function(require,module,exports){
-/**
- * JSONSchema Validator - Validates JavaScript objects using JSON Schemas
- * (http://www.json.com/json-schema-proposal/)
- *
- * Copyright (c) 2007 Kris Zyp SitePen (www.sitepen.com)
- * Licensed under the MIT (MIT-LICENSE.txt) license.
-To use the validator call the validate function with an instance object and an optional schema object.
-If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
-that schema will be used to validate and the schema parameter is not necessary (if both exist,
-both validations will occur).
-The validate method will return an array of validation errors. If there are no errors, then an
-empty list will be returned. A validation error will have two properties:
-"property" which indicates which property had the error
-"message" which indicates what the error was
- */
-({define:typeof define!="undefined"?define:function(deps, factory){module.exports = factory();}}).
-define([], function(){
-var exports = validate;
-// setup primitive classes to be JSON Schema types
-exports.Integer = {type:"integer"};
-var primitiveConstructors = {
- String: String,
- Boolean: Boolean,
- Number: Number,
- Object: Object,
- Array: Array,
- Date: Date
-}
-exports.validate = validate;
-function validate(/*Any*/instance,/*Object*/schema) {
- // Summary:
- // To use the validator call JSONSchema.validate with an instance object and an optional schema object.
- // If a schema is provided, it will be used to validate. If the instance object refers to a schema (self-validating),
- // that schema will be used to validate and the schema parameter is not necessary (if both exist,
- // both validations will occur).
- // The validate method will return an object with two properties:
- // valid: A boolean indicating if the instance is valid by the schema
- // errors: An array of validation errors. If there are no errors, then an
- // empty list will be returned. A validation error will have two properties:
- // property: which indicates which property had the error
- // message: which indicates what the error was
- //
- return validate(instance, schema, {changing: false});//, coerce: false, existingOnly: false});
- };
-exports.checkPropertyChange = function(/*Any*/value,/*Object*/schema, /*String*/property) {
- // Summary:
- // The checkPropertyChange method will check to see if an value can legally be in property with the given schema
- // This is slightly different than the validate method in that it will fail if the schema is readonly and it will
- // not check for self-validation, it is assumed that the passed in value is already internally valid.
- // The checkPropertyChange method will return the same object type as validate, see JSONSchema.validate for
- // information.
- //
- return validate(value, schema, {changing: property || "property"});
- };
-var validate = exports._validate = function(/*Any*/instance,/*Object*/schema,/*Object*/options) {
-
- if (!options) options = {};
- var _changing = options.changing;
-
- function getType(schema){
- return schema.type || (primitiveConstructors[schema.name] == schema && schema.name.toLowerCase());
- }
- var errors = [];
- // validate a value against a property definition
- function checkProp(value, schema, path,i){
-
- var l;
- path += path ? typeof i == 'number' ? '[' + i + ']' : typeof i == 'undefined' ? '' : '.' + i : i;
- function addError(message){
- errors.push({property:path,message:message});
- }
-
- if((typeof schema != 'object' || schema instanceof Array) && (path || typeof schema != 'function') && !(schema && getType(schema))){
- if(typeof schema == 'function'){
- if(!(value instanceof schema)){
- addError("is not an instance of the class/constructor " + schema.name);
- }
- }else if(schema){
- addError("Invalid schema/property definition " + schema);
- }
- return null;
- }
- if(_changing && schema.readonly){
- addError("is a readonly field, it can not be changed");
- }
- if(schema['extends']){ // if it extends another schema, it must pass that schema as well
- checkProp(value,schema['extends'],path,i);
- }
- // validate a value against a type definition
- function checkType(type,value){
- if(type){
- if(typeof type == 'string' && type != 'any' &&
- (type == 'null' ? value !== null : typeof value != type) &&
- !(value instanceof Array && type == 'array') &&
- !(value instanceof Date && type == 'date') &&
- !(type == 'integer' && value%1===0)){
- return [{property:path,message:(typeof value) + " value found, but a " + type + " is required"}];
- }
- if(type instanceof Array){
- var unionErrors=[];
- for(var j = 0; j < type.length; j++){ // a union type
- if(!(unionErrors=checkType(type[j],value)).length){
- break;
- }
- }
- if(unionErrors.length){
- return unionErrors;
- }
- }else if(typeof type == 'object'){
- var priorErrors = errors;
- errors = [];
- checkProp(value,type,path);
- var theseErrors = errors;
- errors = priorErrors;
- return theseErrors;
- }
- }
- return [];
- }
- if(value === undefined){
- if(schema.required){
- addError("is missing and it is required");
- }
- }else{
- errors = errors.concat(checkType(getType(schema),value));
- if(schema.disallow && !checkType(schema.disallow,value).length){
- addError(" disallowed value was matched");
- }
- if(value !== null){
- if(value instanceof Array){
- if(schema.items){
- var itemsIsArray = schema.items instanceof Array;
- var propDef = schema.items;
- for (i = 0, l = value.length; i < l; i += 1) {
- if (itemsIsArray)
- propDef = schema.items[i];
- if (options.coerce)
- value[i] = options.coerce(value[i], propDef);
- errors.concat(checkProp(value[i],propDef,path,i));
- }
- }
- if(schema.minItems && value.length < schema.minItems){
- addError("There must be a minimum of " + schema.minItems + " in the array");
- }
- if(schema.maxItems && value.length > schema.maxItems){
- addError("There must be a maximum of " + schema.maxItems + " in the array");
- }
- }else if(schema.properties || schema.additionalProperties){
- errors.concat(checkObj(value, schema.properties, path, schema.additionalProperties));
- }
- if(schema.pattern && typeof value == 'string' && !value.match(schema.pattern)){
- addError("does not match the regex pattern " + schema.pattern);
- }
- if(schema.maxLength && typeof value == 'string' && value.length > schema.maxLength){
- addError("may only be " + schema.maxLength + " characters long");
- }
- if(schema.minLength && typeof value == 'string' && value.length < schema.minLength){
- addError("must be at least " + schema.minLength + " characters long");
- }
- if(typeof schema.minimum !== undefined && typeof value == typeof schema.minimum &&
- schema.minimum > value){
- addError("must have a minimum value of " + schema.minimum);
- }
- if(typeof schema.maximum !== undefined && typeof value == typeof schema.maximum &&
- schema.maximum < value){
- addError("must have a maximum value of " + schema.maximum);
- }
- if(schema['enum']){
- var enumer = schema['enum'];
- l = enumer.length;
- var found;
- for(var j = 0; j < l; j++){
- if(enumer[j]===value){
- found=1;
- break;
- }
- }
- if(!found){
- addError("does not have a value in the enumeration " + enumer.join(", "));
- }
- }
- if(typeof schema.maxDecimal == 'number' &&
- (value.toString().match(new RegExp("\\.[0-9]{" + (schema.maxDecimal + 1) + ",}")))){
- addError("may only have " + schema.maxDecimal + " digits of decimal places");
- }
- }
- }
- return null;
- }
- // validate an object against a schema
- function checkObj(instance,objTypeDef,path,additionalProp){
-
- if(typeof objTypeDef =='object'){
- if(typeof instance != 'object' || instance instanceof Array){
- errors.push({property:path,message:"an object is required"});
- }
-
- for(var i in objTypeDef){
- if(objTypeDef.hasOwnProperty(i)){
- var value = instance[i];
- // skip _not_ specified properties
- if (value === undefined && options.existingOnly) continue;
- var propDef = objTypeDef[i];
- // set default
- if(value === undefined && propDef["default"]){
- value = instance[i] = propDef["default"];
- }
- if(options.coerce && i in instance){
- value = instance[i] = options.coerce(value, propDef);
- }
- checkProp(value,propDef,path,i);
- }
- }
- }
- for(i in instance){
- if(instance.hasOwnProperty(i) && !(i.charAt(0) == '_' && i.charAt(1) == '_') && objTypeDef && !objTypeDef[i] && additionalProp===false){
- if (options.filter) {
- delete instance[i];
- continue;
- } else {
- errors.push({property:path,message:(typeof value) + "The property " + i +
- " is not defined in the schema and the schema does not allow additional properties"});
- }
- }
- var requires = objTypeDef && objTypeDef[i] && objTypeDef[i].requires;
- if(requires && !(requires in instance)){
- errors.push({property:path,message:"the presence of the property " + i + " requires that " + requires + " also be present"});
- }
- value = instance[i];
- if(additionalProp && (!(objTypeDef && typeof objTypeDef == 'object') || !(i in objTypeDef))){
- if(options.coerce){
- value = instance[i] = options.coerce(value, additionalProp);
- }
- checkProp(value,additionalProp,path,i);
- }
- if(!_changing && value && value.$schema){
- errors = errors.concat(checkProp(value,value.$schema,path,i));
- }
- }
- return errors;
- }
- if(schema){
- checkProp(instance,schema,'',_changing || '');
- }
- if(!_changing && instance && instance.$schema){
- checkProp(instance,instance.$schema,'','');
- }
- return {valid:!errors.length,errors:errors};
-};
-exports.mustBeValid = function(result){
- // summary:
- // This checks to ensure that the result is valid and will throw an appropriate error message if it is not
- // result: the result returned from checkPropertyChange or validate
- if(!result.valid){
- throw new TypeError(result.errors.map(function(error){return "for property " + error.property + ': ' + error.message;}).join(", \n"));
- }
-}
-
-return exports;
-});
-
-},{}],66:[function(require,module,exports){
-exports = module.exports = stringify
-exports.getSerialize = serializer
-
-function stringify(obj, replacer, spaces, cycleReplacer) {
- return JSON.stringify(obj, serializer(replacer, cycleReplacer), spaces)
-}
-
-function serializer(replacer, cycleReplacer) {
- var stack = [], keys = []
-
- if (cycleReplacer == null) cycleReplacer = function(key, value) {
- if (stack[0] === value) return "[Circular ~]"
- return "[Circular ~." + keys.slice(0, stack.indexOf(value)).join(".") + "]"
- }
-
- return function(key, value) {
- if (stack.length > 0) {
- var thisPos = stack.indexOf(this)
- ~thisPos ? stack.splice(thisPos + 1) : stack.push(this)
- ~thisPos ? keys.splice(thisPos, Infinity, key) : keys.push(key)
- if (~stack.indexOf(value)) value = cycleReplacer.call(this, key, value)
- }
- else stack.push(value)
-
- return replacer == null ? value : replacer.call(this, key, value)
- }
-}
-
-},{}],67:[function(require,module,exports){
-var untilde = function(str) {
- return str.replace(/~./g, function(m) {
- switch (m) {
- case "~0":
- return "~";
- case "~1":
- return "/";
- }
- throw new Error("Invalid tilde escape: " + m);
- });
-}
-
-var traverse = function(obj, pointer, value) {
- // assert(isArray(pointer))
- var part = untilde(pointer.shift());
- if(!obj.hasOwnProperty(part)) {
- return null;
- }
- if(pointer.length !== 0) { // keep traversin!
- return traverse(obj[part], pointer, value);
- }
- // we're done
- if(typeof value === "undefined") {
- // just reading
- return obj[part];
- }
- // set new value, return old value
- var old_value = obj[part];
- if(value === null) {
- delete obj[part];
- } else {
- obj[part] = value;
- }
- return old_value;
-}
-
-var validate_input = function(obj, pointer) {
- if(typeof obj !== "object") {
- throw new Error("Invalid input object.");
- }
-
- if(pointer === "") {
- return [];
- }
-
- if(!pointer) {
- throw new Error("Invalid JSON pointer.");
- }
-
- pointer = pointer.split("/");
- var first = pointer.shift();
- if (first !== "") {
- throw new Error("Invalid JSON pointer.");
- }
-
- return pointer;
-}
-
-var get = function(obj, pointer) {
- pointer = validate_input(obj, pointer);
- if (pointer.length === 0) {
- return obj;
- }
- return traverse(obj, pointer);
-}
-
-var set = function(obj, pointer, value) {
- pointer = validate_input(obj, pointer);
- if (pointer.length === 0) {
- throw new Error("Invalid JSON pointer for set.")
- }
- return traverse(obj, pointer, value);
-}
-
-exports.get = get
-exports.set = set
-
-},{}],68:[function(require,module,exports){
-/*
- * lib/jsprim.js: utilities for primitive JavaScript types
- */
-
-var mod_assert = require('assert');
-var mod_util = require('util');
-
-var mod_extsprintf = require('extsprintf');
-var mod_verror = require('verror');
-var mod_jsonschema = require('json-schema');
-
-/*
- * Public interface
- */
-exports.deepCopy = deepCopy;
-exports.deepEqual = deepEqual;
-exports.isEmpty = isEmpty;
-exports.hasKey = hasKey;
-exports.forEachKey = forEachKey;
-exports.pluck = pluck;
-exports.flattenObject = flattenObject;
-exports.flattenIter = flattenIter;
-exports.validateJsonObject = validateJsonObjectJS;
-exports.validateJsonObjectJS = validateJsonObjectJS;
-exports.randElt = randElt;
-exports.extraProperties = extraProperties;
-exports.mergeObjects = mergeObjects;
-
-exports.startsWith = startsWith;
-exports.endsWith = endsWith;
-
-exports.iso8601 = iso8601;
-exports.rfc1123 = rfc1123;
-exports.parseDateTime = parseDateTime;
-
-exports.hrtimediff = hrtimeDiff;
-exports.hrtimeDiff = hrtimeDiff;
-exports.hrtimeAccum = hrtimeAccum;
-exports.hrtimeAdd = hrtimeAdd;
-exports.hrtimeNanosec = hrtimeNanosec;
-exports.hrtimeMicrosec = hrtimeMicrosec;
-exports.hrtimeMillisec = hrtimeMillisec;
-
-
-/*
- * Deep copy an acyclic *basic* Javascript object. This only handles basic
- * scalars (strings, numbers, booleans) and arbitrarily deep arrays and objects
- * containing these. This does *not* handle instances of other classes.
- */
-function deepCopy(obj)
-{
- var ret, key;
- var marker = '__deepCopy';
-
- if (obj && obj[marker])
- throw (new Error('attempted deep copy of cyclic object'));
-
- if (obj && obj.constructor == Object) {
- ret = {};
- obj[marker] = true;
-
- for (key in obj) {
- if (key == marker)
- continue;
-
- ret[key] = deepCopy(obj[key]);
- }
-
- delete (obj[marker]);
- return (ret);
- }
-
- if (obj && obj.constructor == Array) {
- ret = [];
- obj[marker] = true;
-
- for (key = 0; key < obj.length; key++)
- ret.push(deepCopy(obj[key]));
-
- delete (obj[marker]);
- return (ret);
- }
-
- /*
- * It must be a primitive type -- just return it.
- */
- return (obj);
-}
-
-function deepEqual(obj1, obj2)
-{
- if (typeof (obj1) != typeof (obj2))
- return (false);
-
- if (obj1 === null || obj2 === null || typeof (obj1) != 'object')
- return (obj1 === obj2);
-
- if (obj1.constructor != obj2.constructor)
- return (false);
-
- var k;
- for (k in obj1) {
- if (!obj2.hasOwnProperty(k))
- return (false);
-
- if (!deepEqual(obj1[k], obj2[k]))
- return (false);
- }
-
- for (k in obj2) {
- if (!obj1.hasOwnProperty(k))
- return (false);
- }
-
- return (true);
-}
-
-function isEmpty(obj)
-{
- var key;
- for (key in obj)
- return (false);
- return (true);
-}
-
-function hasKey(obj, key)
-{
- mod_assert.equal(typeof (key), 'string');
- return (Object.prototype.hasOwnProperty.call(obj, key));
-}
-
-function forEachKey(obj, callback)
-{
- for (var key in obj) {
- if (hasKey(obj, key)) {
- callback(key, obj[key]);
- }
- }
-}
-
-function pluck(obj, key)
-{
- mod_assert.equal(typeof (key), 'string');
- return (pluckv(obj, key));
-}
-
-function pluckv(obj, key)
-{
- if (obj === null || typeof (obj) !== 'object')
- return (undefined);
-
- if (obj.hasOwnProperty(key))
- return (obj[key]);
-
- var i = key.indexOf('.');
- if (i == -1)
- return (undefined);
-
- var key1 = key.substr(0, i);
- if (!obj.hasOwnProperty(key1))
- return (undefined);
-
- return (pluckv(obj[key1], key.substr(i + 1)));
-}
-
-/*
- * Invoke callback(row) for each entry in the array that would be returned by
- * flattenObject(data, depth). This is just like flattenObject(data,
- * depth).forEach(callback), except that the intermediate array is never
- * created.
- */
-function flattenIter(data, depth, callback)
-{
- doFlattenIter(data, depth, [], callback);
-}
-
-function doFlattenIter(data, depth, accum, callback)
-{
- var each;
- var key;
-
- if (depth === 0) {
- each = accum.slice(0);
- each.push(data);
- callback(each);
- return;
- }
-
- mod_assert.ok(data !== null);
- mod_assert.equal(typeof (data), 'object');
- mod_assert.equal(typeof (depth), 'number');
- mod_assert.ok(depth >= 0);
-
- for (key in data) {
- each = accum.slice(0);
- each.push(key);
- doFlattenIter(data[key], depth - 1, each, callback);
- }
-}
-
-function flattenObject(data, depth)
-{
- if (depth === 0)
- return ([ data ]);
-
- mod_assert.ok(data !== null);
- mod_assert.equal(typeof (data), 'object');
- mod_assert.equal(typeof (depth), 'number');
- mod_assert.ok(depth >= 0);
-
- var rv = [];
- var key;
-
- for (key in data) {
- flattenObject(data[key], depth - 1).forEach(function (p) {
- rv.push([ key ].concat(p));
- });
- }
-
- return (rv);
-}
-
-function startsWith(str, prefix)
-{
- return (str.substr(0, prefix.length) == prefix);
-}
-
-function endsWith(str, suffix)
-{
- return (str.substr(
- str.length - suffix.length, suffix.length) == suffix);
-}
-
-function iso8601(d)
-{
- if (typeof (d) == 'number')
- d = new Date(d);
- mod_assert.ok(d.constructor === Date);
- return (mod_extsprintf.sprintf('%4d-%02d-%02dT%02d:%02d:%02d.%03dZ',
- d.getUTCFullYear(), d.getUTCMonth() + 1, d.getUTCDate(),
- d.getUTCHours(), d.getUTCMinutes(), d.getUTCSeconds(),
- d.getUTCMilliseconds()));
-}
-
-var RFC1123_MONTHS = [
- 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
- 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
-var RFC1123_DAYS = [
- 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
-
-function rfc1123(date) {
- return (mod_extsprintf.sprintf('%s, %02d %s %04d %02d:%02d:%02d GMT',
- RFC1123_DAYS[date.getUTCDay()], date.getUTCDate(),
- RFC1123_MONTHS[date.getUTCMonth()], date.getUTCFullYear(),
- date.getUTCHours(), date.getUTCMinutes(),
- date.getUTCSeconds()));
-}
-
-/*
- * Parses a date expressed as a string, as either a number of milliseconds since
- * the epoch or any string format that Date accepts, giving preference to the
- * former where these two sets overlap (e.g., small numbers).
- */
-function parseDateTime(str)
-{
- /*
- * This is irritatingly implicit, but significantly more concise than
- * alternatives. The "+str" will convert a string containing only a
- * number directly to a Number, or NaN for other strings. Thus, if the
- * conversion succeeds, we use it (this is the milliseconds-since-epoch
- * case). Otherwise, we pass the string directly to the Date
- * constructor to parse.
- */
- var numeric = +str;
- if (!isNaN(numeric)) {
- return (new Date(numeric));
- } else {
- return (new Date(str));
- }
-}
-
-function validateJsonObjectJS(schema, input)
-{
- var report = mod_jsonschema.validate(input, schema);
-
- if (report.errors.length === 0)
- return (null);
-
- /* Currently, we only do anything useful with the first error. */
- var error = report.errors[0];
-
- /* The failed property is given by a URI with an irrelevant prefix. */
- var propname = error['property'];
- var reason = error['message'].toLowerCase();
- var i, j;
-
- /*
- * There's at least one case where the property error message is
- * confusing at best. We work around this here.
- */
- if ((i = reason.indexOf('the property ')) != -1 &&
- (j = reason.indexOf(' is not defined in the schema and the ' +
- 'schema does not allow additional properties')) != -1) {
- i += 'the property '.length;
- if (propname === '')
- propname = reason.substr(i, j - i);
- else
- propname = propname + '.' + reason.substr(i, j - i);
-
- reason = 'unsupported property';
- }
-
- var rv = new mod_verror.VError('property "%s": %s', propname, reason);
- rv.jsv_details = error;
- return (rv);
-}
-
-function randElt(arr)
-{
- mod_assert.ok(Array.isArray(arr) && arr.length > 0,
- 'randElt argument must be a non-empty array');
-
- return (arr[Math.floor(Math.random() * arr.length)]);
-}
-
-function assertHrtime(a)
-{
- mod_assert.ok(a[0] >= 0 && a[1] >= 0,
- 'negative numbers not allowed in hrtimes');
- mod_assert.ok(a[1] < 1e9, 'nanoseconds column overflow');
-}
-
-/*
- * Compute the time elapsed between hrtime readings A and B, where A is later
- * than B. hrtime readings come from Node's process.hrtime(). There is no
- * defined way to represent negative deltas, so it's illegal to diff B from A
- * where the time denoted by B is later than the time denoted by A. If this
- * becomes valuable, we can define a representation and extend the
- * implementation to support it.
- */
-function hrtimeDiff(a, b)
-{
- assertHrtime(a);
- assertHrtime(b);
- mod_assert.ok(a[0] > b[0] || (a[0] == b[0] && a[1] >= b[1]),
- 'negative differences not allowed');
-
- var rv = [ a[0] - b[0], 0 ];
-
- if (a[1] >= b[1]) {
- rv[1] = a[1] - b[1];
- } else {
- rv[0]--;
- rv[1] = 1e9 - (b[1] - a[1]);
- }
-
- return (rv);
-}
-
-/*
- * Convert a hrtime reading from the array format returned by Node's
- * process.hrtime() into a scalar number of nanoseconds.
- */
-function hrtimeNanosec(a)
-{
- assertHrtime(a);
-
- return (Math.floor(a[0] * 1e9 + a[1]));
-}
-
-/*
- * Convert a hrtime reading from the array format returned by Node's
- * process.hrtime() into a scalar number of microseconds.
- */
-function hrtimeMicrosec(a)
-{
- assertHrtime(a);
-
- return (Math.floor(a[0] * 1e6 + a[1] / 1e3));
-}
-
-/*
- * Convert a hrtime reading from the array format returned by Node's
- * process.hrtime() into a scalar number of milliseconds.
- */
-function hrtimeMillisec(a)
-{
- assertHrtime(a);
-
- return (Math.floor(a[0] * 1e3 + a[1] / 1e6));
-}
-
-/*
- * Add two hrtime readings A and B, overwriting A with the result of the
- * addition. This function is useful for accumulating several hrtime intervals
- * into a counter. Returns A.
- */
-function hrtimeAccum(a, b)
-{
- assertHrtime(a);
- assertHrtime(b);
-
- /*
- * Accumulate the nanosecond component.
- */
- a[1] += b[1];
- if (a[1] >= 1e9) {
- /*
- * The nanosecond component overflowed, so carry to the seconds
- * field.
- */
- a[0]++;
- a[1] -= 1e9;
- }
-
- /*
- * Accumulate the seconds component.
- */
- a[0] += b[0];
-
- return (a);
-}
-
-/*
- * Add two hrtime readings A and B, returning the result as a new hrtime array.
- * Does not modify either input argument.
- */
-function hrtimeAdd(a, b)
-{
- assertHrtime(a);
-
- var rv = [ a[0], a[1] ];
-
- return (hrtimeAccum(rv, b));
-}
-
-
-/*
- * Check an object for unexpected properties. Accepts the object to check, and
- * an array of allowed property names (strings). Returns an array of key names
- * that were found on the object, but did not appear in the list of allowed
- * properties. If no properties were found, the returned array will be of
- * zero length.
- */
-function extraProperties(obj, allowed)
-{
- mod_assert.ok(typeof (obj) === 'object' && obj !== null,
- 'obj argument must be a non-null object');
- mod_assert.ok(Array.isArray(allowed),
- 'allowed argument must be an array of strings');
- for (var i = 0; i < allowed.length; i++) {
- mod_assert.ok(typeof (allowed[i]) === 'string',
- 'allowed argument must be an array of strings');
- }
-
- return (Object.keys(obj).filter(function (key) {
- return (allowed.indexOf(key) === -1);
- }));
-}
-
-/*
- * Given three sets of properties "provided" (may be undefined), "overrides"
- * (required), and "defaults" (may be undefined), construct an object containing
- * the union of these sets with "overrides" overriding "provided", and
- * "provided" overriding "defaults". None of the input objects are modified.
- */
-function mergeObjects(provided, overrides, defaults)
-{
- var rv, k;
-
- rv = {};
- if (defaults) {
- for (k in defaults)
- rv[k] = defaults[k];
- }
-
- if (provided) {
- for (k in provided)
- rv[k] = provided[k];
- }
-
- if (overrides) {
- for (k in overrides)
- rv[k] = overrides[k];
- }
-
- return (rv);
-}
-
-},{"assert":151,"extsprintf":21,"json-schema":65,"util":298,"verror":135}],69:[function(require,module,exports){
-(function (global){
-/**
- * @license
- * lodash
- * Copyright jQuery Foundation and other contributors
- * Released under MIT license
- * Based on Underscore.js 1.8.3
- * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- */
-;(function() {
-
- /** Used as a safe reference for `undefined` in pre-ES5 environments. */
- var undefined;
-
- /** Used as the semantic version number. */
- var VERSION = '4.15.0';
-
- /** Used as the size to enable large array optimizations. */
- var LARGE_ARRAY_SIZE = 200;
-
- /** Used as the `TypeError` message for "Functions" methods. */
- var FUNC_ERROR_TEXT = 'Expected a function';
-
- /** Used to stand-in for `undefined` hash values. */
- var HASH_UNDEFINED = '__lodash_hash_undefined__';
-
- /** Used as the internal argument placeholder. */
- var PLACEHOLDER = '__lodash_placeholder__';
-
- /** Used to compose bitmasks for function metadata. */
- var BIND_FLAG = 1,
- BIND_KEY_FLAG = 2,
- CURRY_BOUND_FLAG = 4,
- CURRY_FLAG = 8,
- CURRY_RIGHT_FLAG = 16,
- PARTIAL_FLAG = 32,
- PARTIAL_RIGHT_FLAG = 64,
- ARY_FLAG = 128,
- REARG_FLAG = 256,
- FLIP_FLAG = 512;
-
- /** Used to compose bitmasks for comparison styles. */
- var UNORDERED_COMPARE_FLAG = 1,
- PARTIAL_COMPARE_FLAG = 2;
-
- /** Used as default options for `_.truncate`. */
- var DEFAULT_TRUNC_LENGTH = 30,
- DEFAULT_TRUNC_OMISSION = '...';
-
- /** Used to detect hot functions by number of calls within a span of milliseconds. */
- var HOT_COUNT = 150,
- HOT_SPAN = 16;
-
- /** Used to indicate the type of lazy iteratees. */
- var LAZY_FILTER_FLAG = 1,
- LAZY_MAP_FLAG = 2,
- LAZY_WHILE_FLAG = 3;
-
- /** Used as references for various `Number` constants. */
- var INFINITY = 1 / 0,
- MAX_SAFE_INTEGER = 9007199254740991,
- MAX_INTEGER = 1.7976931348623157e+308,
- NAN = 0 / 0;
-
- /** Used as references for the maximum length and index of an array. */
- var MAX_ARRAY_LENGTH = 4294967295,
- MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
- HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
-
- /** Used to associate wrap methods with their bit flags. */
- var wrapFlags = [
- ['ary', ARY_FLAG],
- ['bind', BIND_FLAG],
- ['bindKey', BIND_KEY_FLAG],
- ['curry', CURRY_FLAG],
- ['curryRight', CURRY_RIGHT_FLAG],
- ['flip', FLIP_FLAG],
- ['partial', PARTIAL_FLAG],
- ['partialRight', PARTIAL_RIGHT_FLAG],
- ['rearg', REARG_FLAG]
- ];
-
- /** `Object#toString` result references. */
- var argsTag = '[object Arguments]',
- arrayTag = '[object Array]',
- boolTag = '[object Boolean]',
- dateTag = '[object Date]',
- errorTag = '[object Error]',
- funcTag = '[object Function]',
- genTag = '[object GeneratorFunction]',
- mapTag = '[object Map]',
- numberTag = '[object Number]',
- objectTag = '[object Object]',
- promiseTag = '[object Promise]',
- regexpTag = '[object RegExp]',
- setTag = '[object Set]',
- stringTag = '[object String]',
- symbolTag = '[object Symbol]',
- weakMapTag = '[object WeakMap]',
- weakSetTag = '[object WeakSet]';
-
- var arrayBufferTag = '[object ArrayBuffer]',
- dataViewTag = '[object DataView]',
- float32Tag = '[object Float32Array]',
- float64Tag = '[object Float64Array]',
- int8Tag = '[object Int8Array]',
- int16Tag = '[object Int16Array]',
- int32Tag = '[object Int32Array]',
- uint8Tag = '[object Uint8Array]',
- uint8ClampedTag = '[object Uint8ClampedArray]',
- uint16Tag = '[object Uint16Array]',
- uint32Tag = '[object Uint32Array]';
-
- /** Used to match empty string literals in compiled template source. */
- var reEmptyStringLeading = /\b__p \+= '';/g,
- reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
- reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
-
- /** Used to match HTML entities and HTML characters. */
- var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g,
- reUnescapedHtml = /[&<>"'`]/g,
- reHasEscapedHtml = RegExp(reEscapedHtml.source),
- reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
-
- /** Used to match template delimiters. */
- var reEscape = /<%-([\s\S]+?)%>/g,
- reEvaluate = /<%([\s\S]+?)%>/g,
- reInterpolate = /<%=([\s\S]+?)%>/g;
-
- /** Used to match property names within property paths. */
- var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
- reIsPlainProp = /^\w*$/,
- reLeadingDot = /^\./,
- rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
-
- /**
- * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
- */
- var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
- reHasRegExpChar = RegExp(reRegExpChar.source);
-
- /** Used to match leading and trailing whitespace. */
- var reTrim = /^\s+|\s+$/g,
- reTrimStart = /^\s+/,
- reTrimEnd = /\s+$/;
-
- /** Used to match wrap detail comments. */
- var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
- reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
- reSplitDetails = /,? & /;
-
- /** Used to match words composed of alphanumeric characters. */
- var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
-
- /** Used to match backslashes in property paths. */
- var reEscapeChar = /\\(\\)?/g;
-
- /**
- * Used to match
- * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
- */
- var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
-
- /** Used to match `RegExp` flags from their coerced string values. */
- var reFlags = /\w*$/;
-
- /** Used to detect hexadecimal string values. */
- var reHasHexPrefix = /^0x/i;
-
- /** Used to detect bad signed hexadecimal string values. */
- var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
-
- /** Used to detect binary string values. */
- var reIsBinary = /^0b[01]+$/i;
-
- /** Used to detect host constructors (Safari). */
- var reIsHostCtor = /^\[object .+?Constructor\]$/;
-
- /** Used to detect octal string values. */
- var reIsOctal = /^0o[0-7]+$/i;
-
- /** Used to detect unsigned integer values. */
- var reIsUint = /^(?:0|[1-9]\d*)$/;
-
- /** Used to match Latin Unicode letters (excluding mathematical operators). */
- var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
-
- /** Used to ensure capturing order of template delimiters. */
- var reNoMatch = /($^)/;
-
- /** Used to match unescaped characters in compiled string literals. */
- var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
-
- /** Used to compose unicode character classes. */
- var rsAstralRange = '\\ud800-\\udfff',
- rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
- rsComboSymbolsRange = '\\u20d0-\\u20f0',
- rsDingbatRange = '\\u2700-\\u27bf',
- rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
- rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
- rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
- rsPunctuationRange = '\\u2000-\\u206f',
- rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
- rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
- rsVarRange = '\\ufe0e\\ufe0f',
- rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
-
- /** Used to compose unicode capture groups. */
- var rsApos = "['\u2019]",
- rsAstral = '[' + rsAstralRange + ']',
- rsBreak = '[' + rsBreakRange + ']',
- rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
- rsDigits = '\\d+',
- rsDingbat = '[' + rsDingbatRange + ']',
- rsLower = '[' + rsLowerRange + ']',
- rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
- rsFitz = '\\ud83c[\\udffb-\\udfff]',
- rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
- rsNonAstral = '[^' + rsAstralRange + ']',
- rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
- rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
- rsUpper = '[' + rsUpperRange + ']',
- rsZWJ = '\\u200d';
-
- /** Used to compose unicode regexes. */
- var rsLowerMisc = '(?:' + rsLower + '|' + rsMisc + ')',
- rsUpperMisc = '(?:' + rsUpper + '|' + rsMisc + ')',
- rsOptLowerContr = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
- rsOptUpperContr = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
- reOptMod = rsModifier + '?',
- rsOptVar = '[' + rsVarRange + ']?',
- rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
- rsSeq = rsOptVar + reOptMod + rsOptJoin,
- rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
- rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
- /** Used to match apostrophes. */
- var reApos = RegExp(rsApos, 'g');
-
- /**
- * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
- * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
- */
- var reComboMark = RegExp(rsCombo, 'g');
-
- /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
- var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
-
- /** Used to match complex or compound words. */
- var reUnicodeWord = RegExp([
- rsUpper + '?' + rsLower + '+' + rsOptLowerContr + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
- rsUpperMisc + '+' + rsOptUpperContr + '(?=' + [rsBreak, rsUpper + rsLowerMisc, '$'].join('|') + ')',
- rsUpper + '?' + rsLowerMisc + '+' + rsOptLowerContr,
- rsUpper + '+' + rsOptUpperContr,
- rsDigits,
- rsEmoji
- ].join('|'), 'g');
-
- /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
- var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
-
- /** Used to detect strings that need a more robust regexp to match words. */
- var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
-
- /** Used to assign default `context` object properties. */
- var contextProps = [
- 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
- 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
- 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
- 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
- '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
- ];
-
- /** Used to make template sourceURLs easier to identify. */
- var templateCounter = -1;
-
- /** Used to identify `toStringTag` values of typed arrays. */
- var typedArrayTags = {};
- typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
- typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
- typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
- typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
- typedArrayTags[uint32Tag] = true;
- typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
- typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
- typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
- typedArrayTags[errorTag] = typedArrayTags[funcTag] =
- typedArrayTags[mapTag] = typedArrayTags[numberTag] =
- typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
- typedArrayTags[setTag] = typedArrayTags[stringTag] =
- typedArrayTags[weakMapTag] = false;
-
- /** Used to identify `toStringTag` values supported by `_.clone`. */
- var cloneableTags = {};
- cloneableTags[argsTag] = cloneableTags[arrayTag] =
- cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
- cloneableTags[boolTag] = cloneableTags[dateTag] =
- cloneableTags[float32Tag] = cloneableTags[float64Tag] =
- cloneableTags[int8Tag] = cloneableTags[int16Tag] =
- cloneableTags[int32Tag] = cloneableTags[mapTag] =
- cloneableTags[numberTag] = cloneableTags[objectTag] =
- cloneableTags[regexpTag] = cloneableTags[setTag] =
- cloneableTags[stringTag] = cloneableTags[symbolTag] =
- cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
- cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
- cloneableTags[errorTag] = cloneableTags[funcTag] =
- cloneableTags[weakMapTag] = false;
-
- /** Used to map Latin Unicode letters to basic Latin letters. */
- var deburredLetters = {
- // Latin-1 Supplement block.
- '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
- '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
- '\xc7': 'C', '\xe7': 'c',
- '\xd0': 'D', '\xf0': 'd',
- '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
- '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
- '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
- '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
- '\xd1': 'N', '\xf1': 'n',
- '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
- '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
- '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
- '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
- '\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
- '\xc6': 'Ae', '\xe6': 'ae',
- '\xde': 'Th', '\xfe': 'th',
- '\xdf': 'ss',
- // Latin Extended-A block.
- '\u0100': 'A', '\u0102': 'A', '\u0104': 'A',
- '\u0101': 'a', '\u0103': 'a', '\u0105': 'a',
- '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
- '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
- '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
- '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
- '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
- '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
- '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
- '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
- '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
- '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
- '\u0134': 'J', '\u0135': 'j',
- '\u0136': 'K', '\u0137': 'k', '\u0138': 'k',
- '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
- '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
- '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
- '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
- '\u014c': 'O', '\u014e': 'O', '\u0150': 'O',
- '\u014d': 'o', '\u014f': 'o', '\u0151': 'o',
- '\u0154': 'R', '\u0156': 'R', '\u0158': 'R',
- '\u0155': 'r', '\u0157': 'r', '\u0159': 'r',
- '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
- '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's',
- '\u0162': 'T', '\u0164': 'T', '\u0166': 'T',
- '\u0163': 't', '\u0165': 't', '\u0167': 't',
- '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
- '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
- '\u0174': 'W', '\u0175': 'w',
- '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y',
- '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z',
- '\u017a': 'z', '\u017c': 'z', '\u017e': 'z',
- '\u0132': 'IJ', '\u0133': 'ij',
- '\u0152': 'Oe', '\u0153': 'oe',
- '\u0149': "'n", '\u017f': 'ss'
- };
-
- /** Used to map characters to HTML entities. */
- var htmlEscapes = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- "'": ''',
- '`': '`'
- };
-
- /** Used to map HTML entities to characters. */
- var htmlUnescapes = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- ''': "'",
- '`': '`'
- };
-
- /** Used to escape characters for inclusion in compiled string literals. */
- var stringEscapes = {
- '\\': '\\',
- "'": "'",
- '\n': 'n',
- '\r': 'r',
- '\u2028': 'u2028',
- '\u2029': 'u2029'
- };
-
- /** Built-in method references without a dependency on `root`. */
- var freeParseFloat = parseFloat,
- freeParseInt = parseInt;
-
- /** Detect free variable `global` from Node.js. */
- var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
-
- /** Detect free variable `self`. */
- var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
-
- /** Used as a reference to the global object. */
- var root = freeGlobal || freeSelf || Function('return this')();
-
- /** Detect free variable `exports`. */
- var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
-
- /** Detect free variable `module`. */
- var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
-
- /** Detect the popular CommonJS extension `module.exports`. */
- var moduleExports = freeModule && freeModule.exports === freeExports;
-
- /** Detect free variable `process` from Node.js. */
- var freeProcess = moduleExports && freeGlobal.process;
-
- /** Used to access faster Node.js helpers. */
- var nodeUtil = (function() {
- try {
- return freeProcess && freeProcess.binding('util');
- } catch (e) {}
- }());
-
- /* Node.js helper references. */
- var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
- nodeIsDate = nodeUtil && nodeUtil.isDate,
- nodeIsMap = nodeUtil && nodeUtil.isMap,
- nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
- nodeIsSet = nodeUtil && nodeUtil.isSet,
- nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
-
- /*--------------------------------------------------------------------------*/
-
- /**
- * Adds the key-value `pair` to `map`.
- *
- * @private
- * @param {Object} map The map to modify.
- * @param {Array} pair The key-value pair to add.
- * @returns {Object} Returns `map`.
- */
- function addMapEntry(map, pair) {
- // Don't return `map.set` because it's not chainable in IE 11.
- map.set(pair[0], pair[1]);
- return map;
- }
-
- /**
- * Adds `value` to `set`.
- *
- * @private
- * @param {Object} set The set to modify.
- * @param {*} value The value to add.
- * @returns {Object} Returns `set`.
- */
- function addSetEntry(set, value) {
- // Don't return `set.add` because it's not chainable in IE 11.
- set.add(value);
- return set;
- }
-
- /**
- * A faster alternative to `Function#apply`, this function invokes `func`
- * with the `this` binding of `thisArg` and the arguments of `args`.
- *
- * @private
- * @param {Function} func The function to invoke.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} args The arguments to invoke `func` with.
- * @returns {*} Returns the result of `func`.
- */
- function apply(func, thisArg, args) {
- switch (args.length) {
- case 0: return func.call(thisArg);
- case 1: return func.call(thisArg, args[0]);
- case 2: return func.call(thisArg, args[0], args[1]);
- case 3: return func.call(thisArg, args[0], args[1], args[2]);
- }
- return func.apply(thisArg, args);
- }
-
- /**
- * A specialized version of `baseAggregator` for arrays.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform keys.
- * @param {Object} accumulator The initial aggregated object.
- * @returns {Function} Returns `accumulator`.
- */
- function arrayAggregator(array, setter, iteratee, accumulator) {
- var index = -1,
- length = array ? array.length : 0;
-
- while (++index < length) {
- var value = array[index];
- setter(accumulator, value, iteratee(value), array);
- }
- return accumulator;
- }
-
- /**
- * A specialized version of `_.forEach` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
- */
- function arrayEach(array, iteratee) {
- var index = -1,
- length = array ? array.length : 0;
-
- while (++index < length) {
- if (iteratee(array[index], index, array) === false) {
- break;
- }
- }
- return array;
- }
-
- /**
- * A specialized version of `_.forEachRight` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
- */
- function arrayEachRight(array, iteratee) {
- var length = array ? array.length : 0;
-
- while (length--) {
- if (iteratee(array[length], length, array) === false) {
- break;
- }
- }
- return array;
- }
-
- /**
- * A specialized version of `_.every` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check,
- * else `false`.
- */
- function arrayEvery(array, predicate) {
- var index = -1,
- length = array ? array.length : 0;
-
- while (++index < length) {
- if (!predicate(array[index], index, array)) {
- return false;
- }
- }
- return true;
- }
-
- /**
- * A specialized version of `_.filter` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
- function arrayFilter(array, predicate) {
- var index = -1,
- length = array ? array.length : 0,
- resIndex = 0,
- result = [];
-
- while (++index < length) {
- var value = array[index];
- if (predicate(value, index, array)) {
- result[resIndex++] = value;
- }
- }
- return result;
- }
-
- /**
- * A specialized version of `_.includes` for arrays without support for
- * specifying an index to search from.
- *
- * @private
- * @param {Array} [array] The array to inspect.
- * @param {*} target The value to search for.
- * @returns {boolean} Returns `true` if `target` is found, else `false`.
- */
- function arrayIncludes(array, value) {
- var length = array ? array.length : 0;
- return !!length && baseIndexOf(array, value, 0) > -1;
- }
-
- /**
- * This function is like `arrayIncludes` except that it accepts a comparator.
- *
- * @private
- * @param {Array} [array] The array to inspect.
- * @param {*} target The value to search for.
- * @param {Function} comparator The comparator invoked per element.
- * @returns {boolean} Returns `true` if `target` is found, else `false`.
- */
- function arrayIncludesWith(array, value, comparator) {
- var index = -1,
- length = array ? array.length : 0;
-
- while (++index < length) {
- if (comparator(value, array[index])) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * A specialized version of `_.map` for arrays without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- */
- function arrayMap(array, iteratee) {
- var index = -1,
- length = array ? array.length : 0,
- result = Array(length);
-
- while (++index < length) {
- result[index] = iteratee(array[index], index, array);
- }
- return result;
- }
-
- /**
- * Appends the elements of `values` to `array`.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to append.
- * @returns {Array} Returns `array`.
- */
- function arrayPush(array, values) {
- var index = -1,
- length = values.length,
- offset = array.length;
-
- while (++index < length) {
- array[offset + index] = values[index];
- }
- return array;
- }
-
- /**
- * A specialized version of `_.reduce` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the first element of `array` as
- * the initial value.
- * @returns {*} Returns the accumulated value.
- */
- function arrayReduce(array, iteratee, accumulator, initAccum) {
- var index = -1,
- length = array ? array.length : 0;
-
- if (initAccum && length) {
- accumulator = array[++index];
- }
- while (++index < length) {
- accumulator = iteratee(accumulator, array[index], index, array);
- }
- return accumulator;
- }
-
- /**
- * A specialized version of `_.reduceRight` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the last element of `array` as
- * the initial value.
- * @returns {*} Returns the accumulated value.
- */
- function arrayReduceRight(array, iteratee, accumulator, initAccum) {
- var length = array ? array.length : 0;
- if (initAccum && length) {
- accumulator = array[--length];
- }
- while (length--) {
- accumulator = iteratee(accumulator, array[length], length, array);
- }
- return accumulator;
- }
-
- /**
- * A specialized version of `_.some` for arrays without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check,
- * else `false`.
- */
- function arraySome(array, predicate) {
- var index = -1,
- length = array ? array.length : 0;
-
- while (++index < length) {
- if (predicate(array[index], index, array)) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * Gets the size of an ASCII `string`.
- *
- * @private
- * @param {string} string The string inspect.
- * @returns {number} Returns the string size.
- */
- var asciiSize = baseProperty('length');
-
- /**
- * Converts an ASCII `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function asciiToArray(string) {
- return string.split('');
- }
-
- /**
- * Splits an ASCII `string` into an array of its words.
- *
- * @private
- * @param {string} The string to inspect.
- * @returns {Array} Returns the words of `string`.
- */
- function asciiWords(string) {
- return string.match(reAsciiWord) || [];
- }
-
- /**
- * The base implementation of methods like `_.findKey` and `_.findLastKey`,
- * without support for iteratee shorthands, which iterates over `collection`
- * using `eachFunc`.
- *
- * @private
- * @param {Array|Object} collection The collection to inspect.
- * @param {Function} predicate The function invoked per iteration.
- * @param {Function} eachFunc The function to iterate over `collection`.
- * @returns {*} Returns the found element or its key, else `undefined`.
- */
- function baseFindKey(collection, predicate, eachFunc) {
- var result;
- eachFunc(collection, function(value, key, collection) {
- if (predicate(value, key, collection)) {
- result = key;
- return false;
- }
- });
- return result;
- }
-
- /**
- * The base implementation of `_.findIndex` and `_.findLastIndex` without
- * support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} predicate The function invoked per iteration.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseFindIndex(array, predicate, fromIndex, fromRight) {
- var length = array.length,
- index = fromIndex + (fromRight ? 1 : -1);
-
- while ((fromRight ? index-- : ++index < length)) {
- if (predicate(array[index], index, array)) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseIndexOf(array, value, fromIndex) {
- if (value !== value) {
- return baseFindIndex(array, baseIsNaN, fromIndex);
- }
- var index = fromIndex - 1,
- length = array.length;
-
- while (++index < length) {
- if (array[index] === value) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * This function is like `baseIndexOf` except that it accepts a comparator.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @param {Function} comparator The comparator invoked per element.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseIndexOfWith(array, value, fromIndex, comparator) {
- var index = fromIndex - 1,
- length = array.length;
-
- while (++index < length) {
- if (comparator(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * The base implementation of `_.isNaN` without support for number objects.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
- */
- function baseIsNaN(value) {
- return value !== value;
- }
-
- /**
- * The base implementation of `_.mean` and `_.meanBy` without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {number} Returns the mean.
- */
- function baseMean(array, iteratee) {
- var length = array ? array.length : 0;
- return length ? (baseSum(array, iteratee) / length) : NAN;
- }
-
- /**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
- function baseProperty(key) {
- return function(object) {
- return object == null ? undefined : object[key];
- };
- }
-
- /**
- * The base implementation of `_.propertyOf` without support for deep paths.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Function} Returns the new accessor function.
- */
- function basePropertyOf(object) {
- return function(key) {
- return object == null ? undefined : object[key];
- };
- }
-
- /**
- * The base implementation of `_.reduce` and `_.reduceRight`, without support
- * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} accumulator The initial value.
- * @param {boolean} initAccum Specify using the first or last element of
- * `collection` as the initial value.
- * @param {Function} eachFunc The function to iterate over `collection`.
- * @returns {*} Returns the accumulated value.
- */
- function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
- eachFunc(collection, function(value, index, collection) {
- accumulator = initAccum
- ? (initAccum = false, value)
- : iteratee(accumulator, value, index, collection);
- });
- return accumulator;
- }
-
- /**
- * The base implementation of `_.sortBy` which uses `comparer` to define the
- * sort order of `array` and replaces criteria objects with their corresponding
- * values.
- *
- * @private
- * @param {Array} array The array to sort.
- * @param {Function} comparer The function to define sort order.
- * @returns {Array} Returns `array`.
- */
- function baseSortBy(array, comparer) {
- var length = array.length;
-
- array.sort(comparer);
- while (length--) {
- array[length] = array[length].value;
- }
- return array;
- }
-
- /**
- * The base implementation of `_.sum` and `_.sumBy` without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {number} Returns the sum.
- */
- function baseSum(array, iteratee) {
- var result,
- index = -1,
- length = array.length;
-
- while (++index < length) {
- var current = iteratee(array[index]);
- if (current !== undefined) {
- result = result === undefined ? current : (result + current);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.times` without support for iteratee shorthands
- * or max array length checks.
- *
- * @private
- * @param {number} n The number of times to invoke `iteratee`.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the array of results.
- */
- function baseTimes(n, iteratee) {
- var index = -1,
- result = Array(n);
-
- while (++index < n) {
- result[index] = iteratee(index);
- }
- return result;
- }
-
- /**
- * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
- * of key-value pairs for `object` corresponding to the property names of `props`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the key-value pairs.
- */
- function baseToPairs(object, props) {
- return arrayMap(props, function(key) {
- return [key, object[key]];
- });
- }
-
- /**
- * The base implementation of `_.unary` without support for storing metadata.
- *
- * @private
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new capped function.
- */
- function baseUnary(func) {
- return function(value) {
- return func(value);
- };
- }
-
- /**
- * The base implementation of `_.values` and `_.valuesIn` which creates an
- * array of `object` property values corresponding to the property names
- * of `props`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the array of property values.
- */
- function baseValues(object, props) {
- return arrayMap(props, function(key) {
- return object[key];
- });
- }
-
- /**
- * Checks if a cache value for `key` exists.
- *
- * @private
- * @param {Object} cache The cache to query.
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function cacheHas(cache, key) {
- return cache.has(key);
- }
-
- /**
- * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the first unmatched string symbol.
- */
- function charsStartIndex(strSymbols, chrSymbols) {
- var index = -1,
- length = strSymbols.length;
-
- while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
- return index;
- }
-
- /**
- * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the last unmatched string symbol.
- */
- function charsEndIndex(strSymbols, chrSymbols) {
- var index = strSymbols.length;
-
- while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
- return index;
- }
-
- /**
- * Gets the number of `placeholder` occurrences in `array`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} placeholder The placeholder to search for.
- * @returns {number} Returns the placeholder count.
- */
- function countHolders(array, placeholder) {
- var length = array.length,
- result = 0;
-
- while (length--) {
- if (array[length] === placeholder) {
- result++;
- }
- }
- return result;
- }
-
- /**
- * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
- * letters to basic Latin letters.
- *
- * @private
- * @param {string} letter The matched letter to deburr.
- * @returns {string} Returns the deburred letter.
- */
- var deburrLetter = basePropertyOf(deburredLetters);
-
- /**
- * Used by `_.escape` to convert characters to HTML entities.
- *
- * @private
- * @param {string} chr The matched character to escape.
- * @returns {string} Returns the escaped character.
- */
- var escapeHtmlChar = basePropertyOf(htmlEscapes);
-
- /**
- * Used by `_.template` to escape characters for inclusion in compiled string literals.
- *
- * @private
- * @param {string} chr The matched character to escape.
- * @returns {string} Returns the escaped character.
- */
- function escapeStringChar(chr) {
- return '\\' + stringEscapes[chr];
- }
-
- /**
- * Gets the value at `key` of `object`.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {string} key The key of the property to get.
- * @returns {*} Returns the property value.
- */
- function getValue(object, key) {
- return object == null ? undefined : object[key];
- }
-
- /**
- * Checks if `string` contains Unicode symbols.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {boolean} Returns `true` if a symbol is found, else `false`.
- */
- function hasUnicode(string) {
- return reHasUnicode.test(string);
- }
-
- /**
- * Checks if `string` contains a word composed of Unicode symbols.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {boolean} Returns `true` if a word is found, else `false`.
- */
- function hasUnicodeWord(string) {
- return reHasUnicodeWord.test(string);
- }
-
- /**
- * Checks if `value` is a host object in IE < 9.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
- */
- function isHostObject(value) {
- // Many host objects are `Object` objects that can coerce to strings
- // despite having improperly defined `toString` methods.
- var result = false;
- if (value != null && typeof value.toString != 'function') {
- try {
- result = !!(value + '');
- } catch (e) {}
- }
- return result;
- }
-
- /**
- * Converts `iterator` to an array.
- *
- * @private
- * @param {Object} iterator The iterator to convert.
- * @returns {Array} Returns the converted array.
- */
- function iteratorToArray(iterator) {
- var data,
- result = [];
-
- while (!(data = iterator.next()).done) {
- result.push(data.value);
- }
- return result;
- }
-
- /**
- * Converts `map` to its key-value pairs.
- *
- * @private
- * @param {Object} map The map to convert.
- * @returns {Array} Returns the key-value pairs.
- */
- function mapToArray(map) {
- var index = -1,
- result = Array(map.size);
-
- map.forEach(function(value, key) {
- result[++index] = [key, value];
- });
- return result;
- }
-
- /**
- * Creates a unary function that invokes `func` with its argument transformed.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {Function} transform The argument transform.
- * @returns {Function} Returns the new function.
- */
- function overArg(func, transform) {
- return function(arg) {
- return func(transform(arg));
- };
- }
-
- /**
- * Replaces all `placeholder` elements in `array` with an internal placeholder
- * and returns an array of their indexes.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {*} placeholder The placeholder to replace.
- * @returns {Array} Returns the new array of placeholder indexes.
- */
- function replaceHolders(array, placeholder) {
- var index = -1,
- length = array.length,
- resIndex = 0,
- result = [];
-
- while (++index < length) {
- var value = array[index];
- if (value === placeholder || value === PLACEHOLDER) {
- array[index] = PLACEHOLDER;
- result[resIndex++] = index;
- }
- }
- return result;
- }
-
- /**
- * Converts `set` to an array of its values.
- *
- * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the values.
- */
- function setToArray(set) {
- var index = -1,
- result = Array(set.size);
-
- set.forEach(function(value) {
- result[++index] = value;
- });
- return result;
- }
-
- /**
- * Converts `set` to its value-value pairs.
- *
- * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the value-value pairs.
- */
- function setToPairs(set) {
- var index = -1,
- result = Array(set.size);
-
- set.forEach(function(value) {
- result[++index] = [value, value];
- });
- return result;
- }
-
- /**
- * Gets the number of symbols in `string`.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {number} Returns the string size.
- */
- function stringSize(string) {
- return hasUnicode(string)
- ? unicodeSize(string)
- : asciiSize(string);
- }
-
- /**
- * Converts `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function stringToArray(string) {
- return hasUnicode(string)
- ? unicodeToArray(string)
- : asciiToArray(string);
- }
-
- /**
- * Used by `_.unescape` to convert HTML entities to characters.
- *
- * @private
- * @param {string} chr The matched character to unescape.
- * @returns {string} Returns the unescaped character.
- */
- var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
-
- /**
- * Gets the size of a Unicode `string`.
- *
- * @private
- * @param {string} string The string inspect.
- * @returns {number} Returns the string size.
- */
- function unicodeSize(string) {
- var result = reUnicode.lastIndex = 0;
- while (reUnicode.test(string)) {
- result++;
- }
- return result;
- }
-
- /**
- * Converts a Unicode `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function unicodeToArray(string) {
- return string.match(reUnicode) || [];
- }
-
- /**
- * Splits a Unicode `string` into an array of its words.
- *
- * @private
- * @param {string} The string to inspect.
- * @returns {Array} Returns the words of `string`.
- */
- function unicodeWords(string) {
- return string.match(reUnicodeWord) || [];
- }
-
- /*--------------------------------------------------------------------------*/
-
- /**
- * Create a new pristine `lodash` function using the `context` object.
- *
- * @static
- * @memberOf _
- * @since 1.1.0
- * @category Util
- * @param {Object} [context=root] The context object.
- * @returns {Function} Returns a new `lodash` function.
- * @example
- *
- * _.mixin({ 'foo': _.constant('foo') });
- *
- * var lodash = _.runInContext();
- * lodash.mixin({ 'bar': lodash.constant('bar') });
- *
- * _.isFunction(_.foo);
- * // => true
- * _.isFunction(_.bar);
- * // => false
- *
- * lodash.isFunction(lodash.foo);
- * // => false
- * lodash.isFunction(lodash.bar);
- * // => true
- *
- * // Use `context` to stub `Date#getTime` use in `_.now`.
- * var stubbed = _.runInContext({
- * 'Date': function() {
- * return { 'getTime': stubGetTime };
- * }
- * });
- *
- * // Create a suped-up `defer` in Node.js.
- * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
- */
- function runInContext(context) {
- context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;
-
- /** Built-in constructor references. */
- var Array = context.Array,
- Date = context.Date,
- Error = context.Error,
- Function = context.Function,
- Math = context.Math,
- Object = context.Object,
- RegExp = context.RegExp,
- String = context.String,
- TypeError = context.TypeError;
-
- /** Used for built-in method references. */
- var arrayProto = Array.prototype,
- funcProto = Function.prototype,
- objectProto = Object.prototype;
-
- /** Used to detect overreaching core-js shims. */
- var coreJsData = context['__core-js_shared__'];
-
- /** Used to detect methods masquerading as native. */
- var maskSrcKey = (function() {
- var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
- return uid ? ('Symbol(src)_1.' + uid) : '';
- }());
-
- /** Used to resolve the decompiled source of functions. */
- var funcToString = funcProto.toString;
-
- /** Used to check objects for own properties. */
- var hasOwnProperty = objectProto.hasOwnProperty;
-
- /** Used to generate unique IDs. */
- var idCounter = 0;
-
- /** Used to infer the `Object` constructor. */
- var objectCtorString = funcToString.call(Object);
-
- /**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
- var objectToString = objectProto.toString;
-
- /** Used to restore the original `_` reference in `_.noConflict`. */
- var oldDash = root._;
-
- /** Used to detect if a method is native. */
- var reIsNative = RegExp('^' +
- funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
- .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
- );
-
- /** Built-in value references. */
- var Buffer = moduleExports ? context.Buffer : undefined,
- Symbol = context.Symbol,
- Uint8Array = context.Uint8Array,
- getPrototype = overArg(Object.getPrototypeOf, Object),
- iteratorSymbol = Symbol ? Symbol.iterator : undefined,
- objectCreate = Object.create,
- propertyIsEnumerable = objectProto.propertyIsEnumerable,
- splice = arrayProto.splice,
- spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined;
-
- /** Mocked built-ins. */
- var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
- ctxNow = Date && Date.now !== root.Date.now && Date.now,
- ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
-
- /* Built-in method references for those with the same name as other `lodash` methods. */
- var nativeCeil = Math.ceil,
- nativeFloor = Math.floor,
- nativeGetSymbols = Object.getOwnPropertySymbols,
- nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
- nativeIsFinite = context.isFinite,
- nativeJoin = arrayProto.join,
- nativeKeys = overArg(Object.keys, Object),
- nativeMax = Math.max,
- nativeMin = Math.min,
- nativeParseInt = context.parseInt,
- nativeRandom = Math.random,
- nativeReverse = arrayProto.reverse;
-
- /* Built-in method references that are verified to be native. */
- var DataView = getNative(context, 'DataView'),
- Map = getNative(context, 'Map'),
- Promise = getNative(context, 'Promise'),
- Set = getNative(context, 'Set'),
- WeakMap = getNative(context, 'WeakMap'),
- nativeCreate = getNative(Object, 'create');
-
- /* Used to set `toString` methods. */
- var defineProperty = (function() {
- var func = getNative(Object, 'defineProperty'),
- name = getNative.name;
-
- return (name && name.length > 2) ? func : undefined;
- }());
-
- /** Used to store function metadata. */
- var metaMap = WeakMap && new WeakMap;
-
- /** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
- var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
-
- /** Used to lookup unminified function names. */
- var realNames = {};
-
- /** Used to detect maps, sets, and weakmaps. */
- var dataViewCtorString = toSource(DataView),
- mapCtorString = toSource(Map),
- promiseCtorString = toSource(Promise),
- setCtorString = toSource(Set),
- weakMapCtorString = toSource(WeakMap);
-
- /** Used to convert symbols to primitives and strings. */
- var symbolProto = Symbol ? Symbol.prototype : undefined,
- symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
- symbolToString = symbolProto ? symbolProto.toString : undefined;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a `lodash` object which wraps `value` to enable implicit method
- * chain sequences. Methods that operate on and return arrays, collections,
- * and functions can be chained together. Methods that retrieve a single value
- * or may return a primitive value will automatically end the chain sequence
- * and return the unwrapped value. Otherwise, the value must be unwrapped
- * with `_#value`.
- *
- * Explicit chain sequences, which must be unwrapped with `_#value`, may be
- * enabled using `_.chain`.
- *
- * The execution of chained methods is lazy, that is, it's deferred until
- * `_#value` is implicitly or explicitly called.
- *
- * Lazy evaluation allows several methods to support shortcut fusion.
- * Shortcut fusion is an optimization to merge iteratee calls; this avoids
- * the creation of intermediate arrays and can greatly reduce the number of
- * iteratee executions. Sections of a chain sequence qualify for shortcut
- * fusion if the section is applied to an array of at least `200` elements
- * and any iteratees accept only one argument. The heuristic for whether a
- * section qualifies for shortcut fusion is subject to change.
- *
- * Chaining is supported in custom builds as long as the `_#value` method is
- * directly or indirectly included in the build.
- *
- * In addition to lodash methods, wrappers have `Array` and `String` methods.
- *
- * The wrapper `Array` methods are:
- * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
- *
- * The wrapper `String` methods are:
- * `replace` and `split`
- *
- * The wrapper methods that support shortcut fusion are:
- * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
- * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
- * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
- *
- * The chainable wrapper methods are:
- * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
- * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
- * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
- * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
- * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
- * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
- * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
- * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
- * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
- * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
- * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
- * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
- * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
- * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
- * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
- * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
- * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
- * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
- * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
- * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
- * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
- * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
- * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
- * `zipObject`, `zipObjectDeep`, and `zipWith`
- *
- * The wrapper methods that are **not** chainable by default are:
- * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
- * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
- * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
- * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
- * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
- * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
- * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
- * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
- * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
- * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
- * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
- * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
- * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
- * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
- * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
- * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
- * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
- * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
- * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
- * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
- * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
- * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
- * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
- * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
- * `upperFirst`, `value`, and `words`
- *
- * @name _
- * @constructor
- * @category Seq
- * @param {*} value The value to wrap in a `lodash` instance.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var wrapped = _([1, 2, 3]);
- *
- * // Returns an unwrapped value.
- * wrapped.reduce(_.add);
- * // => 6
- *
- * // Returns a wrapped value.
- * var squares = wrapped.map(square);
- *
- * _.isArray(squares);
- * // => false
- *
- * _.isArray(squares.value());
- * // => true
- */
- function lodash(value) {
- if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
- if (value instanceof LodashWrapper) {
- return value;
- }
- if (hasOwnProperty.call(value, '__wrapped__')) {
- return wrapperClone(value);
- }
- }
- return new LodashWrapper(value);
- }
-
- /**
- * The function whose prototype chain sequence wrappers inherit from.
- *
- * @private
- */
- function baseLodash() {
- // No operation performed.
- }
-
- /**
- * The base constructor for creating `lodash` wrapper objects.
- *
- * @private
- * @param {*} value The value to wrap.
- * @param {boolean} [chainAll] Enable explicit method chain sequences.
- */
- function LodashWrapper(value, chainAll) {
- this.__wrapped__ = value;
- this.__actions__ = [];
- this.__chain__ = !!chainAll;
- this.__index__ = 0;
- this.__values__ = undefined;
- }
-
- /**
- * By default, the template delimiters used by lodash are like those in
- * embedded Ruby (ERB). Change the following template settings to use
- * alternative delimiters.
- *
- * @static
- * @memberOf _
- * @type {Object}
- */
- lodash.templateSettings = {
-
- /**
- * Used to detect `data` property values to be HTML-escaped.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'escape': reEscape,
-
- /**
- * Used to detect code to be evaluated.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'evaluate': reEvaluate,
-
- /**
- * Used to detect `data` property values to inject.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'interpolate': reInterpolate,
-
- /**
- * Used to reference the data object in the template text.
- *
- * @memberOf _.templateSettings
- * @type {string}
- */
- 'variable': '',
-
- /**
- * Used to import variables into the compiled template.
- *
- * @memberOf _.templateSettings
- * @type {Object}
- */
- 'imports': {
-
- /**
- * A reference to the `lodash` function.
- *
- * @memberOf _.templateSettings.imports
- * @type {Function}
- */
- '_': lodash
- }
- };
-
- // Ensure wrappers are instances of `baseLodash`.
- lodash.prototype = baseLodash.prototype;
- lodash.prototype.constructor = lodash;
-
- LodashWrapper.prototype = baseCreate(baseLodash.prototype);
- LodashWrapper.prototype.constructor = LodashWrapper;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
- *
- * @private
- * @constructor
- * @param {*} value The value to wrap.
- */
- function LazyWrapper(value) {
- this.__wrapped__ = value;
- this.__actions__ = [];
- this.__dir__ = 1;
- this.__filtered__ = false;
- this.__iteratees__ = [];
- this.__takeCount__ = MAX_ARRAY_LENGTH;
- this.__views__ = [];
- }
-
- /**
- * Creates a clone of the lazy wrapper object.
- *
- * @private
- * @name clone
- * @memberOf LazyWrapper
- * @returns {Object} Returns the cloned `LazyWrapper` object.
- */
- function lazyClone() {
- var result = new LazyWrapper(this.__wrapped__);
- result.__actions__ = copyArray(this.__actions__);
- result.__dir__ = this.__dir__;
- result.__filtered__ = this.__filtered__;
- result.__iteratees__ = copyArray(this.__iteratees__);
- result.__takeCount__ = this.__takeCount__;
- result.__views__ = copyArray(this.__views__);
- return result;
- }
-
- /**
- * Reverses the direction of lazy iteration.
- *
- * @private
- * @name reverse
- * @memberOf LazyWrapper
- * @returns {Object} Returns the new reversed `LazyWrapper` object.
- */
- function lazyReverse() {
- if (this.__filtered__) {
- var result = new LazyWrapper(this);
- result.__dir__ = -1;
- result.__filtered__ = true;
- } else {
- result = this.clone();
- result.__dir__ *= -1;
- }
- return result;
- }
-
- /**
- * Extracts the unwrapped value from its lazy wrapper.
- *
- * @private
- * @name value
- * @memberOf LazyWrapper
- * @returns {*} Returns the unwrapped value.
- */
- function lazyValue() {
- var array = this.__wrapped__.value(),
- dir = this.__dir__,
- isArr = isArray(array),
- isRight = dir < 0,
- arrLength = isArr ? array.length : 0,
- view = getView(0, arrLength, this.__views__),
- start = view.start,
- end = view.end,
- length = end - start,
- index = isRight ? end : (start - 1),
- iteratees = this.__iteratees__,
- iterLength = iteratees.length,
- resIndex = 0,
- takeCount = nativeMin(length, this.__takeCount__);
-
- if (!isArr || arrLength < LARGE_ARRAY_SIZE ||
- (arrLength == length && takeCount == length)) {
- return baseWrapperValue(array, this.__actions__);
- }
- var result = [];
-
- outer:
- while (length-- && resIndex < takeCount) {
- index += dir;
-
- var iterIndex = -1,
- value = array[index];
-
- while (++iterIndex < iterLength) {
- var data = iteratees[iterIndex],
- iteratee = data.iteratee,
- type = data.type,
- computed = iteratee(value);
-
- if (type == LAZY_MAP_FLAG) {
- value = computed;
- } else if (!computed) {
- if (type == LAZY_FILTER_FLAG) {
- continue outer;
- } else {
- break outer;
- }
- }
- }
- result[resIndex++] = value;
- }
- return result;
- }
-
- // Ensure `LazyWrapper` is an instance of `baseLodash`.
- LazyWrapper.prototype = baseCreate(baseLodash.prototype);
- LazyWrapper.prototype.constructor = LazyWrapper;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a hash object.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function Hash(entries) {
- var index = -1,
- length = entries ? entries.length : 0;
-
- this.clear();
- while (++index < length) {
- var entry = entries[index];
- this.set(entry[0], entry[1]);
- }
- }
-
- /**
- * Removes all key-value entries from the hash.
- *
- * @private
- * @name clear
- * @memberOf Hash
- */
- function hashClear() {
- this.__data__ = nativeCreate ? nativeCreate(null) : {};
- }
-
- /**
- * Removes `key` and its value from the hash.
- *
- * @private
- * @name delete
- * @memberOf Hash
- * @param {Object} hash The hash to modify.
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function hashDelete(key) {
- return this.has(key) && delete this.__data__[key];
- }
-
- /**
- * Gets the hash value for `key`.
- *
- * @private
- * @name get
- * @memberOf Hash
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function hashGet(key) {
- var data = this.__data__;
- if (nativeCreate) {
- var result = data[key];
- return result === HASH_UNDEFINED ? undefined : result;
- }
- return hasOwnProperty.call(data, key) ? data[key] : undefined;
- }
-
- /**
- * Checks if a hash value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf Hash
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function hashHas(key) {
- var data = this.__data__;
- return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
- }
-
- /**
- * Sets the hash `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf Hash
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the hash instance.
- */
- function hashSet(key, value) {
- var data = this.__data__;
- data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
- return this;
- }
-
- // Add methods to `Hash`.
- Hash.prototype.clear = hashClear;
- Hash.prototype['delete'] = hashDelete;
- Hash.prototype.get = hashGet;
- Hash.prototype.has = hashHas;
- Hash.prototype.set = hashSet;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an list cache object.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function ListCache(entries) {
- var index = -1,
- length = entries ? entries.length : 0;
-
- this.clear();
- while (++index < length) {
- var entry = entries[index];
- this.set(entry[0], entry[1]);
- }
- }
-
- /**
- * Removes all key-value entries from the list cache.
- *
- * @private
- * @name clear
- * @memberOf ListCache
- */
- function listCacheClear() {
- this.__data__ = [];
- }
-
- /**
- * Removes `key` and its value from the list cache.
- *
- * @private
- * @name delete
- * @memberOf ListCache
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function listCacheDelete(key) {
- var data = this.__data__,
- index = assocIndexOf(data, key);
-
- if (index < 0) {
- return false;
- }
- var lastIndex = data.length - 1;
- if (index == lastIndex) {
- data.pop();
- } else {
- splice.call(data, index, 1);
- }
- return true;
- }
-
- /**
- * Gets the list cache value for `key`.
- *
- * @private
- * @name get
- * @memberOf ListCache
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function listCacheGet(key) {
- var data = this.__data__,
- index = assocIndexOf(data, key);
-
- return index < 0 ? undefined : data[index][1];
- }
-
- /**
- * Checks if a list cache value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf ListCache
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function listCacheHas(key) {
- return assocIndexOf(this.__data__, key) > -1;
- }
-
- /**
- * Sets the list cache `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf ListCache
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the list cache instance.
- */
- function listCacheSet(key, value) {
- var data = this.__data__,
- index = assocIndexOf(data, key);
-
- if (index < 0) {
- data.push([key, value]);
- } else {
- data[index][1] = value;
- }
- return this;
- }
-
- // Add methods to `ListCache`.
- ListCache.prototype.clear = listCacheClear;
- ListCache.prototype['delete'] = listCacheDelete;
- ListCache.prototype.get = listCacheGet;
- ListCache.prototype.has = listCacheHas;
- ListCache.prototype.set = listCacheSet;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a map cache object to store key-value pairs.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function MapCache(entries) {
- var index = -1,
- length = entries ? entries.length : 0;
-
- this.clear();
- while (++index < length) {
- var entry = entries[index];
- this.set(entry[0], entry[1]);
- }
- }
-
- /**
- * Removes all key-value entries from the map.
- *
- * @private
- * @name clear
- * @memberOf MapCache
- */
- function mapCacheClear() {
- this.__data__ = {
- 'hash': new Hash,
- 'map': new (Map || ListCache),
- 'string': new Hash
- };
- }
-
- /**
- * Removes `key` and its value from the map.
- *
- * @private
- * @name delete
- * @memberOf MapCache
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function mapCacheDelete(key) {
- return getMapData(this, key)['delete'](key);
- }
-
- /**
- * Gets the map value for `key`.
- *
- * @private
- * @name get
- * @memberOf MapCache
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function mapCacheGet(key) {
- return getMapData(this, key).get(key);
- }
-
- /**
- * Checks if a map value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf MapCache
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function mapCacheHas(key) {
- return getMapData(this, key).has(key);
- }
-
- /**
- * Sets the map `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf MapCache
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the map cache instance.
- */
- function mapCacheSet(key, value) {
- getMapData(this, key).set(key, value);
- return this;
- }
-
- // Add methods to `MapCache`.
- MapCache.prototype.clear = mapCacheClear;
- MapCache.prototype['delete'] = mapCacheDelete;
- MapCache.prototype.get = mapCacheGet;
- MapCache.prototype.has = mapCacheHas;
- MapCache.prototype.set = mapCacheSet;
-
- /*------------------------------------------------------------------------*/
-
- /**
- *
- * Creates an array cache object to store unique values.
- *
- * @private
- * @constructor
- * @param {Array} [values] The values to cache.
- */
- function SetCache(values) {
- var index = -1,
- length = values ? values.length : 0;
-
- this.__data__ = new MapCache;
- while (++index < length) {
- this.add(values[index]);
- }
- }
-
- /**
- * Adds `value` to the array cache.
- *
- * @private
- * @name add
- * @memberOf SetCache
- * @alias push
- * @param {*} value The value to cache.
- * @returns {Object} Returns the cache instance.
- */
- function setCacheAdd(value) {
- this.__data__.set(value, HASH_UNDEFINED);
- return this;
- }
-
- /**
- * Checks if `value` is in the array cache.
- *
- * @private
- * @name has
- * @memberOf SetCache
- * @param {*} value The value to search for.
- * @returns {number} Returns `true` if `value` is found, else `false`.
- */
- function setCacheHas(value) {
- return this.__data__.has(value);
- }
-
- // Add methods to `SetCache`.
- SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
- SetCache.prototype.has = setCacheHas;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a stack cache object to store key-value pairs.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function Stack(entries) {
- this.__data__ = new ListCache(entries);
- }
-
- /**
- * Removes all key-value entries from the stack.
- *
- * @private
- * @name clear
- * @memberOf Stack
- */
- function stackClear() {
- this.__data__ = new ListCache;
- }
-
- /**
- * Removes `key` and its value from the stack.
- *
- * @private
- * @name delete
- * @memberOf Stack
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function stackDelete(key) {
- return this.__data__['delete'](key);
- }
-
- /**
- * Gets the stack value for `key`.
- *
- * @private
- * @name get
- * @memberOf Stack
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function stackGet(key) {
- return this.__data__.get(key);
- }
-
- /**
- * Checks if a stack value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf Stack
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function stackHas(key) {
- return this.__data__.has(key);
- }
-
- /**
- * Sets the stack `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf Stack
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the stack cache instance.
- */
- function stackSet(key, value) {
- var cache = this.__data__;
- if (cache instanceof ListCache) {
- var pairs = cache.__data__;
- if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
- pairs.push([key, value]);
- return this;
- }
- cache = this.__data__ = new MapCache(pairs);
- }
- cache.set(key, value);
- return this;
- }
-
- // Add methods to `Stack`.
- Stack.prototype.clear = stackClear;
- Stack.prototype['delete'] = stackDelete;
- Stack.prototype.get = stackGet;
- Stack.prototype.has = stackHas;
- Stack.prototype.set = stackSet;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an array of the enumerable property names of the array-like `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @param {boolean} inherited Specify returning inherited property names.
- * @returns {Array} Returns the array of property names.
- */
- function arrayLikeKeys(value, inherited) {
- // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
- // Safari 9 makes `arguments.length` enumerable in strict mode.
- var result = (isArray(value) || isArguments(value))
- ? baseTimes(value.length, String)
- : [];
-
- var length = result.length,
- skipIndexes = !!length;
-
- for (var key in value) {
- if ((inherited || hasOwnProperty.call(value, key)) &&
- !(skipIndexes && (key == 'length' || isIndex(key, length)))) {
- result.push(key);
- }
- }
- return result;
- }
-
- /**
- * Used by `_.defaults` to customize its `_.assignIn` use.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to assign.
- * @param {Object} object The parent object of `objValue`.
- * @returns {*} Returns the value to assign.
- */
- function assignInDefaults(objValue, srcValue, key, object) {
- if (objValue === undefined ||
- (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
- return srcValue;
- }
- return objValue;
- }
-
- /**
- * This function is like `assignValue` except that it doesn't assign
- * `undefined` values.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function assignMergeValue(object, key, value) {
- if ((value !== undefined && !eq(object[key], value)) ||
- (typeof key == 'number' && value === undefined && !(key in object))) {
- object[key] = value;
- }
- }
-
- /**
- * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function assignValue(object, key, value) {
- var objValue = object[key];
- if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
- (value === undefined && !(key in object))) {
- object[key] = value;
- }
- }
-
- /**
- * Gets the index at which the `key` is found in `array` of key-value pairs.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} key The key to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function assocIndexOf(array, key) {
- var length = array.length;
- while (length--) {
- if (eq(array[length][0], key)) {
- return length;
- }
- }
- return -1;
- }
-
- /**
- * Aggregates elements of `collection` on `accumulator` with keys transformed
- * by `iteratee` and values set by `setter`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform keys.
- * @param {Object} accumulator The initial aggregated object.
- * @returns {Function} Returns `accumulator`.
- */
- function baseAggregator(collection, setter, iteratee, accumulator) {
- baseEach(collection, function(value, key, collection) {
- setter(accumulator, value, iteratee(value), collection);
- });
- return accumulator;
- }
-
- /**
- * The base implementation of `_.assign` without support for multiple sources
- * or `customizer` functions.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @returns {Object} Returns `object`.
- */
- function baseAssign(object, source) {
- return object && copyObject(source, keys(source), object);
- }
-
- /**
- * The base implementation of `_.at` without support for individual paths.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {string[]} paths The property paths of elements to pick.
- * @returns {Array} Returns the picked elements.
- */
- function baseAt(object, paths) {
- var index = -1,
- isNil = object == null,
- length = paths.length,
- result = Array(length);
-
- while (++index < length) {
- result[index] = isNil ? undefined : get(object, paths[index]);
- }
- return result;
- }
-
- /**
- * The base implementation of `_.clamp` which doesn't coerce arguments.
- *
- * @private
- * @param {number} number The number to clamp.
- * @param {number} [lower] The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the clamped number.
- */
- function baseClamp(number, lower, upper) {
- if (number === number) {
- if (upper !== undefined) {
- number = number <= upper ? number : upper;
- }
- if (lower !== undefined) {
- number = number >= lower ? number : lower;
- }
- }
- return number;
- }
-
- /**
- * The base implementation of `_.clone` and `_.cloneDeep` which tracks
- * traversed objects.
- *
- * @private
- * @param {*} value The value to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @param {boolean} [isFull] Specify a clone including symbols.
- * @param {Function} [customizer] The function to customize cloning.
- * @param {string} [key] The key of `value`.
- * @param {Object} [object] The parent object of `value`.
- * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
- * @returns {*} Returns the cloned value.
- */
- function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
- var result;
- if (customizer) {
- result = object ? customizer(value, key, object, stack) : customizer(value);
- }
- if (result !== undefined) {
- return result;
- }
- if (!isObject(value)) {
- return value;
- }
- var isArr = isArray(value);
- if (isArr) {
- result = initCloneArray(value);
- if (!isDeep) {
- return copyArray(value, result);
- }
- } else {
- var tag = getTag(value),
- isFunc = tag == funcTag || tag == genTag;
-
- if (isBuffer(value)) {
- return cloneBuffer(value, isDeep);
- }
- if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
- if (isHostObject(value)) {
- return object ? value : {};
- }
- result = initCloneObject(isFunc ? {} : value);
- if (!isDeep) {
- return copySymbols(value, baseAssign(result, value));
- }
- } else {
- if (!cloneableTags[tag]) {
- return object ? value : {};
- }
- result = initCloneByTag(value, tag, baseClone, isDeep);
- }
- }
- // Check for circular references and return its corresponding clone.
- stack || (stack = new Stack);
- var stacked = stack.get(value);
- if (stacked) {
- return stacked;
- }
- stack.set(value, result);
-
- if (!isArr) {
- var props = isFull ? getAllKeys(value) : keys(value);
- }
- arrayEach(props || value, function(subValue, key) {
- if (props) {
- key = subValue;
- subValue = value[key];
- }
- // Recursively populate clone (susceptible to call stack limits).
- assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
- });
- return result;
- }
-
- /**
- * The base implementation of `_.conforms` which doesn't clone `source`.
- *
- * @private
- * @param {Object} source The object of property predicates to conform to.
- * @returns {Function} Returns the new spec function.
- */
- function baseConforms(source) {
- var props = keys(source);
- return function(object) {
- return baseConformsTo(object, source, props);
- };
- }
-
- /**
- * The base implementation of `_.conformsTo` which accepts `props` to check.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property predicates to conform to.
- * @returns {boolean} Returns `true` if `object` conforms, else `false`.
- */
- function baseConformsTo(object, source, props) {
- var length = props.length;
- if (object == null) {
- return !length;
- }
- object = Object(object);
- while (length--) {
- var key = props[length],
- predicate = source[key],
- value = object[key];
-
- if ((value === undefined && !(key in object)) || !predicate(value)) {
- return false;
- }
- }
- return true;
- }
-
- /**
- * The base implementation of `_.create` without support for assigning
- * properties to the created object.
- *
- * @private
- * @param {Object} prototype The object to inherit from.
- * @returns {Object} Returns the new object.
- */
- function baseCreate(proto) {
- return isObject(proto) ? objectCreate(proto) : {};
- }
-
- /**
- * The base implementation of `_.delay` and `_.defer` which accepts `args`
- * to provide to `func`.
- *
- * @private
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Array} args The arguments to provide to `func`.
- * @returns {number|Object} Returns the timer id or timeout object.
- */
- function baseDelay(func, wait, args) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return setTimeout(function() { func.apply(undefined, args); }, wait);
- }
-
- /**
- * The base implementation of methods like `_.difference` without support
- * for excluding multiple arrays or iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Array} values The values to exclude.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- */
- function baseDifference(array, values, iteratee, comparator) {
- var index = -1,
- includes = arrayIncludes,
- isCommon = true,
- length = array.length,
- result = [],
- valuesLength = values.length;
-
- if (!length) {
- return result;
- }
- if (iteratee) {
- values = arrayMap(values, baseUnary(iteratee));
- }
- if (comparator) {
- includes = arrayIncludesWith;
- isCommon = false;
- }
- else if (values.length >= LARGE_ARRAY_SIZE) {
- includes = cacheHas;
- isCommon = false;
- values = new SetCache(values);
- }
- outer:
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- value = (comparator || value !== 0) ? value : 0;
- if (isCommon && computed === computed) {
- var valuesIndex = valuesLength;
- while (valuesIndex--) {
- if (values[valuesIndex] === computed) {
- continue outer;
- }
- }
- result.push(value);
- }
- else if (!includes(values, computed, comparator)) {
- result.push(value);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.forEach` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- */
- var baseEach = createBaseEach(baseForOwn);
-
- /**
- * The base implementation of `_.forEachRight` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- */
- var baseEachRight = createBaseEach(baseForOwnRight, true);
-
- /**
- * The base implementation of `_.every` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check,
- * else `false`
- */
- function baseEvery(collection, predicate) {
- var result = true;
- baseEach(collection, function(value, index, collection) {
- result = !!predicate(value, index, collection);
- return result;
- });
- return result;
- }
-
- /**
- * The base implementation of methods like `_.max` and `_.min` which accepts a
- * `comparator` to determine the extremum value.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The iteratee invoked per iteration.
- * @param {Function} comparator The comparator used to compare values.
- * @returns {*} Returns the extremum value.
- */
- function baseExtremum(array, iteratee, comparator) {
- var index = -1,
- length = array.length;
-
- while (++index < length) {
- var value = array[index],
- current = iteratee(value);
-
- if (current != null && (computed === undefined
- ? (current === current && !isSymbol(current))
- : comparator(current, computed)
- )) {
- var computed = current,
- result = value;
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.fill` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to fill.
- * @param {*} value The value to fill `array` with.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns `array`.
- */
- function baseFill(array, value, start, end) {
- var length = array.length;
-
- start = toInteger(start);
- if (start < 0) {
- start = -start > length ? 0 : (length + start);
- }
- end = (end === undefined || end > length) ? length : toInteger(end);
- if (end < 0) {
- end += length;
- }
- end = start > end ? 0 : toLength(end);
- while (start < end) {
- array[start++] = value;
- }
- return array;
- }
-
- /**
- * The base implementation of `_.filter` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
- function baseFilter(collection, predicate) {
- var result = [];
- baseEach(collection, function(value, index, collection) {
- if (predicate(value, index, collection)) {
- result.push(value);
- }
- });
- return result;
- }
-
- /**
- * The base implementation of `_.flatten` with support for restricting flattening.
- *
- * @private
- * @param {Array} array The array to flatten.
- * @param {number} depth The maximum recursion depth.
- * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
- * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
- * @param {Array} [result=[]] The initial result value.
- * @returns {Array} Returns the new flattened array.
- */
- function baseFlatten(array, depth, predicate, isStrict, result) {
- var index = -1,
- length = array.length;
-
- predicate || (predicate = isFlattenable);
- result || (result = []);
-
- while (++index < length) {
- var value = array[index];
- if (depth > 0 && predicate(value)) {
- if (depth > 1) {
- // Recursively flatten arrays (susceptible to call stack limits).
- baseFlatten(value, depth - 1, predicate, isStrict, result);
- } else {
- arrayPush(result, value);
- }
- } else if (!isStrict) {
- result[result.length] = value;
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `baseForOwn` which iterates over `object`
- * properties returned by `keysFunc` and invokes `iteratee` for each property.
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
- var baseFor = createBaseFor();
-
- /**
- * This function is like `baseFor` except that it iterates over properties
- * in the opposite order.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
- var baseForRight = createBaseFor(true);
-
- /**
- * The base implementation of `_.forOwn` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForOwn(object, iteratee) {
- return object && baseFor(object, iteratee, keys);
- }
-
- /**
- * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForOwnRight(object, iteratee) {
- return object && baseForRight(object, iteratee, keys);
- }
-
- /**
- * The base implementation of `_.functions` which creates an array of
- * `object` function property names filtered from `props`.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Array} props The property names to filter.
- * @returns {Array} Returns the function names.
- */
- function baseFunctions(object, props) {
- return arrayFilter(props, function(key) {
- return isFunction(object[key]);
- });
- }
-
- /**
- * The base implementation of `_.get` without support for default values.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to get.
- * @returns {*} Returns the resolved value.
- */
- function baseGet(object, path) {
- path = isKey(path, object) ? [path] : castPath(path);
-
- var index = 0,
- length = path.length;
-
- while (object != null && index < length) {
- object = object[toKey(path[index++])];
- }
- return (index && index == length) ? object : undefined;
- }
-
- /**
- * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
- * `keysFunc` and `symbolsFunc` to get the enumerable property names and
- * symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @param {Function} symbolsFunc The function to get the symbols of `object`.
- * @returns {Array} Returns the array of property names and symbols.
- */
- function baseGetAllKeys(object, keysFunc, symbolsFunc) {
- var result = keysFunc(object);
- return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
- }
-
- /**
- * The base implementation of `getTag`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
- */
- function baseGetTag(value) {
- return objectToString.call(value);
- }
-
- /**
- * The base implementation of `_.gt` which doesn't coerce arguments.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is greater than `other`,
- * else `false`.
- */
- function baseGt(value, other) {
- return value > other;
- }
-
- /**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
- function baseHas(object, key) {
- return object != null && hasOwnProperty.call(object, key);
- }
-
- /**
- * The base implementation of `_.hasIn` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
- function baseHasIn(object, key) {
- return object != null && key in Object(object);
- }
-
- /**
- * The base implementation of `_.inRange` which doesn't coerce arguments.
- *
- * @private
- * @param {number} number The number to check.
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
- */
- function baseInRange(number, start, end) {
- return number >= nativeMin(start, end) && number < nativeMax(start, end);
- }
-
- /**
- * The base implementation of methods like `_.intersection`, without support
- * for iteratee shorthands, that accepts an array of arrays to inspect.
- *
- * @private
- * @param {Array} arrays The arrays to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of shared values.
- */
- function baseIntersection(arrays, iteratee, comparator) {
- var includes = comparator ? arrayIncludesWith : arrayIncludes,
- length = arrays[0].length,
- othLength = arrays.length,
- othIndex = othLength,
- caches = Array(othLength),
- maxLength = Infinity,
- result = [];
-
- while (othIndex--) {
- var array = arrays[othIndex];
- if (othIndex && iteratee) {
- array = arrayMap(array, baseUnary(iteratee));
- }
- maxLength = nativeMin(array.length, maxLength);
- caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
- ? new SetCache(othIndex && array)
- : undefined;
- }
- array = arrays[0];
-
- var index = -1,
- seen = caches[0];
-
- outer:
- while (++index < length && result.length < maxLength) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- value = (comparator || value !== 0) ? value : 0;
- if (!(seen
- ? cacheHas(seen, computed)
- : includes(result, computed, comparator)
- )) {
- othIndex = othLength;
- while (--othIndex) {
- var cache = caches[othIndex];
- if (!(cache
- ? cacheHas(cache, computed)
- : includes(arrays[othIndex], computed, comparator))
- ) {
- continue outer;
- }
- }
- if (seen) {
- seen.push(computed);
- }
- result.push(value);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.invert` and `_.invertBy` which inverts
- * `object` with values transformed by `iteratee` and set by `setter`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform values.
- * @param {Object} accumulator The initial inverted object.
- * @returns {Function} Returns `accumulator`.
- */
- function baseInverter(object, setter, iteratee, accumulator) {
- baseForOwn(object, function(value, key, object) {
- setter(accumulator, iteratee(value), key, object);
- });
- return accumulator;
- }
-
- /**
- * The base implementation of `_.invoke` without support for individual
- * method arguments.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the method to invoke.
- * @param {Array} args The arguments to invoke the method with.
- * @returns {*} Returns the result of the invoked method.
- */
- function baseInvoke(object, path, args) {
- if (!isKey(path, object)) {
- path = castPath(path);
- object = parent(object, path);
- path = last(path);
- }
- var func = object == null ? object : object[toKey(path)];
- return func == null ? undefined : apply(func, object, args);
- }
-
- /**
- * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
- */
- function baseIsArrayBuffer(value) {
- return isObjectLike(value) && objectToString.call(value) == arrayBufferTag;
- }
-
- /**
- * The base implementation of `_.isDate` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
- */
- function baseIsDate(value) {
- return isObjectLike(value) && objectToString.call(value) == dateTag;
- }
-
- /**
- * The base implementation of `_.isEqual` which supports partial comparisons
- * and tracks traversed objects.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @param {Function} [customizer] The function to customize comparisons.
- * @param {boolean} [bitmask] The bitmask of comparison flags.
- * The bitmask may be composed of the following flags:
- * 1 - Unordered comparison
- * 2 - Partial comparison
- * @param {Object} [stack] Tracks traversed `value` and `other` objects.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- */
- function baseIsEqual(value, other, customizer, bitmask, stack) {
- if (value === other) {
- return true;
- }
- if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
- return value !== value && other !== other;
- }
- return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
- }
-
- /**
- * A specialized version of `baseIsEqual` for arrays and objects which performs
- * deep comparisons and tracks traversed objects enabling objects with circular
- * references to be compared.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} [customizer] The function to customize comparisons.
- * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
- * for more details.
- * @param {Object} [stack] Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
- var objIsArr = isArray(object),
- othIsArr = isArray(other),
- objTag = arrayTag,
- othTag = arrayTag;
-
- if (!objIsArr) {
- objTag = getTag(object);
- objTag = objTag == argsTag ? objectTag : objTag;
- }
- if (!othIsArr) {
- othTag = getTag(other);
- othTag = othTag == argsTag ? objectTag : othTag;
- }
- var objIsObj = objTag == objectTag && !isHostObject(object),
- othIsObj = othTag == objectTag && !isHostObject(other),
- isSameTag = objTag == othTag;
-
- if (isSameTag && !objIsObj) {
- stack || (stack = new Stack);
- return (objIsArr || isTypedArray(object))
- ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
- : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
- }
- if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
- var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
- othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
-
- if (objIsWrapped || othIsWrapped) {
- var objUnwrapped = objIsWrapped ? object.value() : object,
- othUnwrapped = othIsWrapped ? other.value() : other;
-
- stack || (stack = new Stack);
- return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
- }
- }
- if (!isSameTag) {
- return false;
- }
- stack || (stack = new Stack);
- return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
- }
-
- /**
- * The base implementation of `_.isMap` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a map, else `false`.
- */
- function baseIsMap(value) {
- return isObjectLike(value) && getTag(value) == mapTag;
- }
-
- /**
- * The base implementation of `_.isMatch` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @param {Array} matchData The property names, values, and compare flags to match.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
- */
- function baseIsMatch(object, source, matchData, customizer) {
- var index = matchData.length,
- length = index,
- noCustomizer = !customizer;
-
- if (object == null) {
- return !length;
- }
- object = Object(object);
- while (index--) {
- var data = matchData[index];
- if ((noCustomizer && data[2])
- ? data[1] !== object[data[0]]
- : !(data[0] in object)
- ) {
- return false;
- }
- }
- while (++index < length) {
- data = matchData[index];
- var key = data[0],
- objValue = object[key],
- srcValue = data[1];
-
- if (noCustomizer && data[2]) {
- if (objValue === undefined && !(key in object)) {
- return false;
- }
- } else {
- var stack = new Stack;
- if (customizer) {
- var result = customizer(objValue, srcValue, key, object, source, stack);
- }
- if (!(result === undefined
- ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
- : result
- )) {
- return false;
- }
- }
- }
- return true;
- }
-
- /**
- * The base implementation of `_.isNative` without bad shim checks.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
- * else `false`.
- */
- function baseIsNative(value) {
- if (!isObject(value) || isMasked(value)) {
- return false;
- }
- var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
- return pattern.test(toSource(value));
- }
-
- /**
- * The base implementation of `_.isRegExp` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
- */
- function baseIsRegExp(value) {
- return isObject(value) && objectToString.call(value) == regexpTag;
- }
-
- /**
- * The base implementation of `_.isSet` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a set, else `false`.
- */
- function baseIsSet(value) {
- return isObjectLike(value) && getTag(value) == setTag;
- }
-
- /**
- * The base implementation of `_.isTypedArray` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
- */
- function baseIsTypedArray(value) {
- return isObjectLike(value) &&
- isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
- }
-
- /**
- * The base implementation of `_.iteratee`.
- *
- * @private
- * @param {*} [value=_.identity] The value to convert to an iteratee.
- * @returns {Function} Returns the iteratee.
- */
- function baseIteratee(value) {
- // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
- // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
- if (typeof value == 'function') {
- return value;
- }
- if (value == null) {
- return identity;
- }
- if (typeof value == 'object') {
- return isArray(value)
- ? baseMatchesProperty(value[0], value[1])
- : baseMatches(value);
- }
- return property(value);
- }
-
- /**
- * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function baseKeys(object) {
- if (!isPrototype(object)) {
- return nativeKeys(object);
- }
- var result = [];
- for (var key in Object(object)) {
- if (hasOwnProperty.call(object, key) && key != 'constructor') {
- result.push(key);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function baseKeysIn(object) {
- if (!isObject(object)) {
- return nativeKeysIn(object);
- }
- var isProto = isPrototype(object),
- result = [];
-
- for (var key in object) {
- if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
- result.push(key);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.lt` which doesn't coerce arguments.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is less than `other`,
- * else `false`.
- */
- function baseLt(value, other) {
- return value < other;
- }
-
- /**
- * The base implementation of `_.map` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- */
- function baseMap(collection, iteratee) {
- var index = -1,
- result = isArrayLike(collection) ? Array(collection.length) : [];
-
- baseEach(collection, function(value, key, collection) {
- result[++index] = iteratee(value, key, collection);
- });
- return result;
- }
-
- /**
- * The base implementation of `_.matches` which doesn't clone `source`.
- *
- * @private
- * @param {Object} source The object of property values to match.
- * @returns {Function} Returns the new spec function.
- */
- function baseMatches(source) {
- var matchData = getMatchData(source);
- if (matchData.length == 1 && matchData[0][2]) {
- return matchesStrictComparable(matchData[0][0], matchData[0][1]);
- }
- return function(object) {
- return object === source || baseIsMatch(object, source, matchData);
- };
- }
-
- /**
- * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
- *
- * @private
- * @param {string} path The path of the property to get.
- * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new spec function.
- */
- function baseMatchesProperty(path, srcValue) {
- if (isKey(path) && isStrictComparable(srcValue)) {
- return matchesStrictComparable(toKey(path), srcValue);
- }
- return function(object) {
- var objValue = get(object, path);
- return (objValue === undefined && objValue === srcValue)
- ? hasIn(object, path)
- : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
- };
- }
-
- /**
- * The base implementation of `_.merge` without support for multiple sources.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} [customizer] The function to customize merged values.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- */
- function baseMerge(object, source, srcIndex, customizer, stack) {
- if (object === source) {
- return;
- }
- if (!(isArray(source) || isTypedArray(source))) {
- var props = baseKeysIn(source);
- }
- arrayEach(props || source, function(srcValue, key) {
- if (props) {
- key = srcValue;
- srcValue = source[key];
- }
- if (isObject(srcValue)) {
- stack || (stack = new Stack);
- baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
- }
- else {
- var newValue = customizer
- ? customizer(object[key], srcValue, (key + ''), object, source, stack)
- : undefined;
-
- if (newValue === undefined) {
- newValue = srcValue;
- }
- assignMergeValue(object, key, newValue);
- }
- });
- }
-
- /**
- * A specialized version of `baseMerge` for arrays and objects which performs
- * deep merges and tracks traversed objects enabling objects with circular
- * references to be merged.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {string} key The key of the value to merge.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} mergeFunc The function to merge values.
- * @param {Function} [customizer] The function to customize assigned values.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- */
- function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
- var objValue = object[key],
- srcValue = source[key],
- stacked = stack.get(srcValue);
-
- if (stacked) {
- assignMergeValue(object, key, stacked);
- return;
- }
- var newValue = customizer
- ? customizer(objValue, srcValue, (key + ''), object, source, stack)
- : undefined;
-
- var isCommon = newValue === undefined;
-
- if (isCommon) {
- newValue = srcValue;
- if (isArray(srcValue) || isTypedArray(srcValue)) {
- if (isArray(objValue)) {
- newValue = objValue;
- }
- else if (isArrayLikeObject(objValue)) {
- newValue = copyArray(objValue);
- }
- else {
- isCommon = false;
- newValue = baseClone(srcValue, true);
- }
- }
- else if (isPlainObject(srcValue) || isArguments(srcValue)) {
- if (isArguments(objValue)) {
- newValue = toPlainObject(objValue);
- }
- else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
- isCommon = false;
- newValue = baseClone(srcValue, true);
- }
- else {
- newValue = objValue;
- }
- }
- else {
- isCommon = false;
- }
- }
- if (isCommon) {
- // Recursively merge objects and arrays (susceptible to call stack limits).
- stack.set(srcValue, newValue);
- mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
- stack['delete'](srcValue);
- }
- assignMergeValue(object, key, newValue);
- }
-
- /**
- * The base implementation of `_.nth` which doesn't coerce arguments.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {number} n The index of the element to return.
- * @returns {*} Returns the nth element of `array`.
- */
- function baseNth(array, n) {
- var length = array.length;
- if (!length) {
- return;
- }
- n += n < 0 ? length : 0;
- return isIndex(n, length) ? array[n] : undefined;
- }
-
- /**
- * The base implementation of `_.orderBy` without param guards.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
- * @param {string[]} orders The sort orders of `iteratees`.
- * @returns {Array} Returns the new sorted array.
- */
- function baseOrderBy(collection, iteratees, orders) {
- var index = -1;
- iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
-
- var result = baseMap(collection, function(value, key, collection) {
- var criteria = arrayMap(iteratees, function(iteratee) {
- return iteratee(value);
- });
- return { 'criteria': criteria, 'index': ++index, 'value': value };
- });
-
- return baseSortBy(result, function(object, other) {
- return compareMultiple(object, other, orders);
- });
- }
-
- /**
- * The base implementation of `_.pick` without support for individual
- * property identifiers.
- *
- * @private
- * @param {Object} object The source object.
- * @param {string[]} props The property identifiers to pick.
- * @returns {Object} Returns the new object.
- */
- function basePick(object, props) {
- object = Object(object);
- return basePickBy(object, props, function(value, key) {
- return key in object;
- });
- }
-
- /**
- * The base implementation of `_.pickBy` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The source object.
- * @param {string[]} props The property identifiers to pick from.
- * @param {Function} predicate The function invoked per property.
- * @returns {Object} Returns the new object.
- */
- function basePickBy(object, props, predicate) {
- var index = -1,
- length = props.length,
- result = {};
-
- while (++index < length) {
- var key = props[index],
- value = object[key];
-
- if (predicate(value, key)) {
- result[key] = value;
- }
- }
- return result;
- }
-
- /**
- * A specialized version of `baseProperty` which supports deep paths.
- *
- * @private
- * @param {Array|string} path The path of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
- function basePropertyDeep(path) {
- return function(object) {
- return baseGet(object, path);
- };
- }
-
- /**
- * The base implementation of `_.pullAllBy` without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns `array`.
- */
- function basePullAll(array, values, iteratee, comparator) {
- var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
- index = -1,
- length = values.length,
- seen = array;
-
- if (array === values) {
- values = copyArray(values);
- }
- if (iteratee) {
- seen = arrayMap(array, baseUnary(iteratee));
- }
- while (++index < length) {
- var fromIndex = 0,
- value = values[index],
- computed = iteratee ? iteratee(value) : value;
-
- while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
- if (seen !== array) {
- splice.call(seen, fromIndex, 1);
- }
- splice.call(array, fromIndex, 1);
- }
- }
- return array;
- }
-
- /**
- * The base implementation of `_.pullAt` without support for individual
- * indexes or capturing the removed elements.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {number[]} indexes The indexes of elements to remove.
- * @returns {Array} Returns `array`.
- */
- function basePullAt(array, indexes) {
- var length = array ? indexes.length : 0,
- lastIndex = length - 1;
-
- while (length--) {
- var index = indexes[length];
- if (length == lastIndex || index !== previous) {
- var previous = index;
- if (isIndex(index)) {
- splice.call(array, index, 1);
- }
- else if (!isKey(index, array)) {
- var path = castPath(index),
- object = parent(array, path);
-
- if (object != null) {
- delete object[toKey(last(path))];
- }
- }
- else {
- delete array[toKey(index)];
- }
- }
- }
- return array;
- }
-
- /**
- * The base implementation of `_.random` without support for returning
- * floating-point numbers.
- *
- * @private
- * @param {number} lower The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the random number.
- */
- function baseRandom(lower, upper) {
- return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
- }
-
- /**
- * The base implementation of `_.range` and `_.rangeRight` which doesn't
- * coerce arguments.
- *
- * @private
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @param {number} step The value to increment or decrement by.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the range of numbers.
- */
- function baseRange(start, end, step, fromRight) {
- var index = -1,
- length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
- result = Array(length);
-
- while (length--) {
- result[fromRight ? length : ++index] = start;
- start += step;
- }
- return result;
- }
-
- /**
- * The base implementation of `_.repeat` which doesn't coerce arguments.
- *
- * @private
- * @param {string} string The string to repeat.
- * @param {number} n The number of times to repeat the string.
- * @returns {string} Returns the repeated string.
- */
- function baseRepeat(string, n) {
- var result = '';
- if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
- return result;
- }
- // Leverage the exponentiation by squaring algorithm for a faster repeat.
- // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
- do {
- if (n % 2) {
- result += string;
- }
- n = nativeFloor(n / 2);
- if (n) {
- string += string;
- }
- } while (n);
-
- return result;
- }
-
- /**
- * The base implementation of `_.rest` which doesn't validate or coerce arguments.
- *
- * @private
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @returns {Function} Returns the new function.
- */
- function baseRest(func, start) {
- start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
- return function() {
- var args = arguments,
- index = -1,
- length = nativeMax(args.length - start, 0),
- array = Array(length);
-
- while (++index < length) {
- array[index] = args[start + index];
- }
- index = -1;
- var otherArgs = Array(start + 1);
- while (++index < start) {
- otherArgs[index] = args[index];
- }
- otherArgs[start] = array;
- return apply(func, this, otherArgs);
- };
- }
-
- /**
- * The base implementation of `_.set`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @param {Function} [customizer] The function to customize path creation.
- * @returns {Object} Returns `object`.
- */
- function baseSet(object, path, value, customizer) {
- if (!isObject(object)) {
- return object;
- }
- path = isKey(path, object) ? [path] : castPath(path);
-
- var index = -1,
- length = path.length,
- lastIndex = length - 1,
- nested = object;
-
- while (nested != null && ++index < length) {
- var key = toKey(path[index]),
- newValue = value;
-
- if (index != lastIndex) {
- var objValue = nested[key];
- newValue = customizer ? customizer(objValue, key, nested) : undefined;
- if (newValue === undefined) {
- newValue = isObject(objValue)
- ? objValue
- : (isIndex(path[index + 1]) ? [] : {});
- }
- }
- assignValue(nested, key, newValue);
- nested = nested[key];
- }
- return object;
- }
-
- /**
- * The base implementation of `setData` without support for hot loop detection.
- *
- * @private
- * @param {Function} func The function to associate metadata with.
- * @param {*} data The metadata.
- * @returns {Function} Returns `func`.
- */
- var baseSetData = !metaMap ? identity : function(func, data) {
- metaMap.set(func, data);
- return func;
- };
-
- /**
- * The base implementation of `_.slice` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
- function baseSlice(array, start, end) {
- var index = -1,
- length = array.length;
-
- if (start < 0) {
- start = -start > length ? 0 : (length + start);
- }
- end = end > length ? length : end;
- if (end < 0) {
- end += length;
- }
- length = start > end ? 0 : ((end - start) >>> 0);
- start >>>= 0;
-
- var result = Array(length);
- while (++index < length) {
- result[index] = array[index + start];
- }
- return result;
- }
-
- /**
- * The base implementation of `_.some` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check,
- * else `false`.
- */
- function baseSome(collection, predicate) {
- var result;
-
- baseEach(collection, function(value, index, collection) {
- result = predicate(value, index, collection);
- return !result;
- });
- return !!result;
- }
-
- /**
- * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
- * performs a binary search of `array` to determine the index at which `value`
- * should be inserted into `array` in order to maintain its sort order.
- *
- * @private
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- */
- function baseSortedIndex(array, value, retHighest) {
- var low = 0,
- high = array ? array.length : low;
-
- if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
- while (low < high) {
- var mid = (low + high) >>> 1,
- computed = array[mid];
-
- if (computed !== null && !isSymbol(computed) &&
- (retHighest ? (computed <= value) : (computed < value))) {
- low = mid + 1;
- } else {
- high = mid;
- }
- }
- return high;
- }
- return baseSortedIndexBy(array, value, identity, retHighest);
- }
-
- /**
- * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
- * which invokes `iteratee` for `value` and each element of `array` to compute
- * their sort ranking. The iteratee is invoked with one argument; (value).
- *
- * @private
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} iteratee The iteratee invoked per element.
- * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- */
- function baseSortedIndexBy(array, value, iteratee, retHighest) {
- value = iteratee(value);
-
- var low = 0,
- high = array ? array.length : 0,
- valIsNaN = value !== value,
- valIsNull = value === null,
- valIsSymbol = isSymbol(value),
- valIsUndefined = value === undefined;
-
- while (low < high) {
- var mid = nativeFloor((low + high) / 2),
- computed = iteratee(array[mid]),
- othIsDefined = computed !== undefined,
- othIsNull = computed === null,
- othIsReflexive = computed === computed,
- othIsSymbol = isSymbol(computed);
-
- if (valIsNaN) {
- var setLow = retHighest || othIsReflexive;
- } else if (valIsUndefined) {
- setLow = othIsReflexive && (retHighest || othIsDefined);
- } else if (valIsNull) {
- setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
- } else if (valIsSymbol) {
- setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
- } else if (othIsNull || othIsSymbol) {
- setLow = false;
- } else {
- setLow = retHighest ? (computed <= value) : (computed < value);
- }
- if (setLow) {
- low = mid + 1;
- } else {
- high = mid;
- }
- }
- return nativeMin(high, MAX_ARRAY_INDEX);
- }
-
- /**
- * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
- * support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseSortedUniq(array, iteratee) {
- var index = -1,
- length = array.length,
- resIndex = 0,
- result = [];
-
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- if (!index || !eq(computed, seen)) {
- var seen = computed;
- result[resIndex++] = value === 0 ? 0 : value;
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.toNumber` which doesn't ensure correct
- * conversions of binary, hexadecimal, or octal string values.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {number} Returns the number.
- */
- function baseToNumber(value) {
- if (typeof value == 'number') {
- return value;
- }
- if (isSymbol(value)) {
- return NAN;
- }
- return +value;
- }
-
- /**
- * The base implementation of `_.toString` which doesn't convert nullish
- * values to empty strings.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {string} Returns the string.
- */
- function baseToString(value) {
- // Exit early for strings to avoid a performance hit in some environments.
- if (typeof value == 'string') {
- return value;
- }
- if (isSymbol(value)) {
- return symbolToString ? symbolToString.call(value) : '';
- }
- var result = (value + '');
- return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
- }
-
- /**
- * The base implementation of `_.uniqBy` without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseUniq(array, iteratee, comparator) {
- var index = -1,
- includes = arrayIncludes,
- length = array.length,
- isCommon = true,
- result = [],
- seen = result;
-
- if (comparator) {
- isCommon = false;
- includes = arrayIncludesWith;
- }
- else if (length >= LARGE_ARRAY_SIZE) {
- var set = iteratee ? null : createSet(array);
- if (set) {
- return setToArray(set);
- }
- isCommon = false;
- includes = cacheHas;
- seen = new SetCache;
- }
- else {
- seen = iteratee ? [] : result;
- }
- outer:
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- value = (comparator || value !== 0) ? value : 0;
- if (isCommon && computed === computed) {
- var seenIndex = seen.length;
- while (seenIndex--) {
- if (seen[seenIndex] === computed) {
- continue outer;
- }
- }
- if (iteratee) {
- seen.push(computed);
- }
- result.push(value);
- }
- else if (!includes(seen, computed, comparator)) {
- if (seen !== result) {
- seen.push(computed);
- }
- result.push(value);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.unset`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to unset.
- * @returns {boolean} Returns `true` if the property is deleted, else `false`.
- */
- function baseUnset(object, path) {
- path = isKey(path, object) ? [path] : castPath(path);
- object = parent(object, path);
-
- var key = toKey(last(path));
- return !(object != null && hasOwnProperty.call(object, key)) || delete object[key];
- }
-
- /**
- * The base implementation of `_.update`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to update.
- * @param {Function} updater The function to produce the updated value.
- * @param {Function} [customizer] The function to customize path creation.
- * @returns {Object} Returns `object`.
- */
- function baseUpdate(object, path, updater, customizer) {
- return baseSet(object, path, updater(baseGet(object, path)), customizer);
- }
-
- /**
- * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
- * without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {Function} predicate The function invoked per iteration.
- * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the slice of `array`.
- */
- function baseWhile(array, predicate, isDrop, fromRight) {
- var length = array.length,
- index = fromRight ? length : -1;
-
- while ((fromRight ? index-- : ++index < length) &&
- predicate(array[index], index, array)) {}
-
- return isDrop
- ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
- : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
- }
-
- /**
- * The base implementation of `wrapperValue` which returns the result of
- * performing a sequence of actions on the unwrapped `value`, where each
- * successive action is supplied the return value of the previous.
- *
- * @private
- * @param {*} value The unwrapped value.
- * @param {Array} actions Actions to perform to resolve the unwrapped value.
- * @returns {*} Returns the resolved value.
- */
- function baseWrapperValue(value, actions) {
- var result = value;
- if (result instanceof LazyWrapper) {
- result = result.value();
- }
- return arrayReduce(actions, function(result, action) {
- return action.func.apply(action.thisArg, arrayPush([result], action.args));
- }, result);
- }
-
- /**
- * The base implementation of methods like `_.xor`, without support for
- * iteratee shorthands, that accepts an array of arrays to inspect.
- *
- * @private
- * @param {Array} arrays The arrays to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of values.
- */
- function baseXor(arrays, iteratee, comparator) {
- var index = -1,
- length = arrays.length;
-
- while (++index < length) {
- var result = result
- ? arrayPush(
- baseDifference(result, arrays[index], iteratee, comparator),
- baseDifference(arrays[index], result, iteratee, comparator)
- )
- : arrays[index];
- }
- return (result && result.length) ? baseUniq(result, iteratee, comparator) : [];
- }
-
- /**
- * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
- *
- * @private
- * @param {Array} props The property identifiers.
- * @param {Array} values The property values.
- * @param {Function} assignFunc The function to assign values.
- * @returns {Object} Returns the new object.
- */
- function baseZipObject(props, values, assignFunc) {
- var index = -1,
- length = props.length,
- valsLength = values.length,
- result = {};
-
- while (++index < length) {
- var value = index < valsLength ? values[index] : undefined;
- assignFunc(result, props[index], value);
- }
- return result;
- }
-
- /**
- * Casts `value` to an empty array if it's not an array like object.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Array|Object} Returns the cast array-like object.
- */
- function castArrayLikeObject(value) {
- return isArrayLikeObject(value) ? value : [];
- }
-
- /**
- * Casts `value` to `identity` if it's not a function.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Function} Returns cast function.
- */
- function castFunction(value) {
- return typeof value == 'function' ? value : identity;
- }
-
- /**
- * Casts `value` to a path array if it's not one.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the cast property path array.
- */
- function castPath(value) {
- return isArray(value) ? value : stringToPath(value);
- }
-
- /**
- * Casts `array` to a slice if it's needed.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {number} start The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the cast slice.
- */
- function castSlice(array, start, end) {
- var length = array.length;
- end = end === undefined ? length : end;
- return (!start && end >= length) ? array : baseSlice(array, start, end);
- }
-
- /**
- * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
- *
- * @private
- * @param {number|Object} id The timer id or timeout object of the timer to clear.
- */
- var clearTimeout = ctxClearTimeout || function(id) {
- return root.clearTimeout(id);
- };
-
- /**
- * Creates a clone of `buffer`.
- *
- * @private
- * @param {Buffer} buffer The buffer to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Buffer} Returns the cloned buffer.
- */
- function cloneBuffer(buffer, isDeep) {
- if (isDeep) {
- return buffer.slice();
- }
- var result = new buffer.constructor(buffer.length);
- buffer.copy(result);
- return result;
- }
-
- /**
- * Creates a clone of `arrayBuffer`.
- *
- * @private
- * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
- * @returns {ArrayBuffer} Returns the cloned array buffer.
- */
- function cloneArrayBuffer(arrayBuffer) {
- var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
- new Uint8Array(result).set(new Uint8Array(arrayBuffer));
- return result;
- }
-
- /**
- * Creates a clone of `dataView`.
- *
- * @private
- * @param {Object} dataView The data view to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned data view.
- */
- function cloneDataView(dataView, isDeep) {
- var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
- return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
- }
-
- /**
- * Creates a clone of `map`.
- *
- * @private
- * @param {Object} map The map to clone.
- * @param {Function} cloneFunc The function to clone values.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned map.
- */
- function cloneMap(map, isDeep, cloneFunc) {
- var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
- return arrayReduce(array, addMapEntry, new map.constructor);
- }
-
- /**
- * Creates a clone of `regexp`.
- *
- * @private
- * @param {Object} regexp The regexp to clone.
- * @returns {Object} Returns the cloned regexp.
- */
- function cloneRegExp(regexp) {
- var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
- result.lastIndex = regexp.lastIndex;
- return result;
- }
-
- /**
- * Creates a clone of `set`.
- *
- * @private
- * @param {Object} set The set to clone.
- * @param {Function} cloneFunc The function to clone values.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned set.
- */
- function cloneSet(set, isDeep, cloneFunc) {
- var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
- return arrayReduce(array, addSetEntry, new set.constructor);
- }
-
- /**
- * Creates a clone of the `symbol` object.
- *
- * @private
- * @param {Object} symbol The symbol object to clone.
- * @returns {Object} Returns the cloned symbol object.
- */
- function cloneSymbol(symbol) {
- return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
- }
-
- /**
- * Creates a clone of `typedArray`.
- *
- * @private
- * @param {Object} typedArray The typed array to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned typed array.
- */
- function cloneTypedArray(typedArray, isDeep) {
- var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
- return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
- }
-
- /**
- * Compares values to sort them in ascending order.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {number} Returns the sort order indicator for `value`.
- */
- function compareAscending(value, other) {
- if (value !== other) {
- var valIsDefined = value !== undefined,
- valIsNull = value === null,
- valIsReflexive = value === value,
- valIsSymbol = isSymbol(value);
-
- var othIsDefined = other !== undefined,
- othIsNull = other === null,
- othIsReflexive = other === other,
- othIsSymbol = isSymbol(other);
-
- if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
- (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
- (valIsNull && othIsDefined && othIsReflexive) ||
- (!valIsDefined && othIsReflexive) ||
- !valIsReflexive) {
- return 1;
- }
- if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
- (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
- (othIsNull && valIsDefined && valIsReflexive) ||
- (!othIsDefined && valIsReflexive) ||
- !othIsReflexive) {
- return -1;
- }
- }
- return 0;
- }
-
- /**
- * Used by `_.orderBy` to compare multiple properties of a value to another
- * and stable sort them.
- *
- * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
- * specify an order of "desc" for descending or "asc" for ascending sort order
- * of corresponding values.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {boolean[]|string[]} orders The order to sort by for each property.
- * @returns {number} Returns the sort order indicator for `object`.
- */
- function compareMultiple(object, other, orders) {
- var index = -1,
- objCriteria = object.criteria,
- othCriteria = other.criteria,
- length = objCriteria.length,
- ordersLength = orders.length;
-
- while (++index < length) {
- var result = compareAscending(objCriteria[index], othCriteria[index]);
- if (result) {
- if (index >= ordersLength) {
- return result;
- }
- var order = orders[index];
- return result * (order == 'desc' ? -1 : 1);
- }
- }
- // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
- // that causes it, under certain circumstances, to provide the same value for
- // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
- // for more details.
- //
- // This also ensures a stable sort in V8 and other engines.
- // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
- return object.index - other.index;
- }
-
- /**
- * Creates an array that is the composition of partially applied arguments,
- * placeholders, and provided arguments into a single array of arguments.
- *
- * @private
- * @param {Array} args The provided arguments.
- * @param {Array} partials The arguments to prepend to those provided.
- * @param {Array} holders The `partials` placeholder indexes.
- * @params {boolean} [isCurried] Specify composing for a curried function.
- * @returns {Array} Returns the new array of composed arguments.
- */
- function composeArgs(args, partials, holders, isCurried) {
- var argsIndex = -1,
- argsLength = args.length,
- holdersLength = holders.length,
- leftIndex = -1,
- leftLength = partials.length,
- rangeLength = nativeMax(argsLength - holdersLength, 0),
- result = Array(leftLength + rangeLength),
- isUncurried = !isCurried;
-
- while (++leftIndex < leftLength) {
- result[leftIndex] = partials[leftIndex];
- }
- while (++argsIndex < holdersLength) {
- if (isUncurried || argsIndex < argsLength) {
- result[holders[argsIndex]] = args[argsIndex];
- }
- }
- while (rangeLength--) {
- result[leftIndex++] = args[argsIndex++];
- }
- return result;
- }
-
- /**
- * This function is like `composeArgs` except that the arguments composition
- * is tailored for `_.partialRight`.
- *
- * @private
- * @param {Array} args The provided arguments.
- * @param {Array} partials The arguments to append to those provided.
- * @param {Array} holders The `partials` placeholder indexes.
- * @params {boolean} [isCurried] Specify composing for a curried function.
- * @returns {Array} Returns the new array of composed arguments.
- */
- function composeArgsRight(args, partials, holders, isCurried) {
- var argsIndex = -1,
- argsLength = args.length,
- holdersIndex = -1,
- holdersLength = holders.length,
- rightIndex = -1,
- rightLength = partials.length,
- rangeLength = nativeMax(argsLength - holdersLength, 0),
- result = Array(rangeLength + rightLength),
- isUncurried = !isCurried;
-
- while (++argsIndex < rangeLength) {
- result[argsIndex] = args[argsIndex];
- }
- var offset = argsIndex;
- while (++rightIndex < rightLength) {
- result[offset + rightIndex] = partials[rightIndex];
- }
- while (++holdersIndex < holdersLength) {
- if (isUncurried || argsIndex < argsLength) {
- result[offset + holders[holdersIndex]] = args[argsIndex++];
- }
- }
- return result;
- }
-
- /**
- * Copies the values of `source` to `array`.
- *
- * @private
- * @param {Array} source The array to copy values from.
- * @param {Array} [array=[]] The array to copy values to.
- * @returns {Array} Returns `array`.
- */
- function copyArray(source, array) {
- var index = -1,
- length = source.length;
-
- array || (array = Array(length));
- while (++index < length) {
- array[index] = source[index];
- }
- return array;
- }
-
- /**
- * Copies properties of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy properties from.
- * @param {Array} props The property identifiers to copy.
- * @param {Object} [object={}] The object to copy properties to.
- * @param {Function} [customizer] The function to customize copied values.
- * @returns {Object} Returns `object`.
- */
- function copyObject(source, props, object, customizer) {
- object || (object = {});
-
- var index = -1,
- length = props.length;
-
- while (++index < length) {
- var key = props[index];
-
- var newValue = customizer
- ? customizer(object[key], source[key], key, object, source)
- : undefined;
-
- assignValue(object, key, newValue === undefined ? source[key] : newValue);
- }
- return object;
- }
-
- /**
- * Copies own symbol properties of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy symbols from.
- * @param {Object} [object={}] The object to copy symbols to.
- * @returns {Object} Returns `object`.
- */
- function copySymbols(source, object) {
- return copyObject(source, getSymbols(source), object);
- }
-
- /**
- * Creates a function like `_.groupBy`.
- *
- * @private
- * @param {Function} setter The function to set accumulator values.
- * @param {Function} [initializer] The accumulator object initializer.
- * @returns {Function} Returns the new aggregator function.
- */
- function createAggregator(setter, initializer) {
- return function(collection, iteratee) {
- var func = isArray(collection) ? arrayAggregator : baseAggregator,
- accumulator = initializer ? initializer() : {};
-
- return func(collection, setter, getIteratee(iteratee, 2), accumulator);
- };
- }
-
- /**
- * Creates a function like `_.assign`.
- *
- * @private
- * @param {Function} assigner The function to assign values.
- * @returns {Function} Returns the new assigner function.
- */
- function createAssigner(assigner) {
- return baseRest(function(object, sources) {
- var index = -1,
- length = sources.length,
- customizer = length > 1 ? sources[length - 1] : undefined,
- guard = length > 2 ? sources[2] : undefined;
-
- customizer = (assigner.length > 3 && typeof customizer == 'function')
- ? (length--, customizer)
- : undefined;
-
- if (guard && isIterateeCall(sources[0], sources[1], guard)) {
- customizer = length < 3 ? undefined : customizer;
- length = 1;
- }
- object = Object(object);
- while (++index < length) {
- var source = sources[index];
- if (source) {
- assigner(object, source, index, customizer);
- }
- }
- return object;
- });
- }
-
- /**
- * Creates a `baseEach` or `baseEachRight` function.
- *
- * @private
- * @param {Function} eachFunc The function to iterate over a collection.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
- function createBaseEach(eachFunc, fromRight) {
- return function(collection, iteratee) {
- if (collection == null) {
- return collection;
- }
- if (!isArrayLike(collection)) {
- return eachFunc(collection, iteratee);
- }
- var length = collection.length,
- index = fromRight ? length : -1,
- iterable = Object(collection);
-
- while ((fromRight ? index-- : ++index < length)) {
- if (iteratee(iterable[index], index, iterable) === false) {
- break;
- }
- }
- return collection;
- };
- }
-
- /**
- * Creates a base function for methods like `_.forIn` and `_.forOwn`.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
- function createBaseFor(fromRight) {
- return function(object, iteratee, keysFunc) {
- var index = -1,
- iterable = Object(object),
- props = keysFunc(object),
- length = props.length;
-
- while (length--) {
- var key = props[fromRight ? length : ++index];
- if (iteratee(iterable[key], key, iterable) === false) {
- break;
- }
- }
- return object;
- };
- }
-
- /**
- * Creates a function that wraps `func` to invoke it with the optional `this`
- * binding of `thisArg`.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createBind(func, bitmask, thisArg) {
- var isBind = bitmask & BIND_FLAG,
- Ctor = createCtor(func);
-
- function wrapper() {
- var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- return fn.apply(isBind ? thisArg : this, arguments);
- }
- return wrapper;
- }
-
- /**
- * Creates a function like `_.lowerFirst`.
- *
- * @private
- * @param {string} methodName The name of the `String` case method to use.
- * @returns {Function} Returns the new case function.
- */
- function createCaseFirst(methodName) {
- return function(string) {
- string = toString(string);
-
- var strSymbols = hasUnicode(string)
- ? stringToArray(string)
- : undefined;
-
- var chr = strSymbols
- ? strSymbols[0]
- : string.charAt(0);
-
- var trailing = strSymbols
- ? castSlice(strSymbols, 1).join('')
- : string.slice(1);
-
- return chr[methodName]() + trailing;
- };
- }
-
- /**
- * Creates a function like `_.camelCase`.
- *
- * @private
- * @param {Function} callback The function to combine each word.
- * @returns {Function} Returns the new compounder function.
- */
- function createCompounder(callback) {
- return function(string) {
- return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
- };
- }
-
- /**
- * Creates a function that produces an instance of `Ctor` regardless of
- * whether it was invoked as part of a `new` expression or by `call` or `apply`.
- *
- * @private
- * @param {Function} Ctor The constructor to wrap.
- * @returns {Function} Returns the new wrapped function.
- */
- function createCtor(Ctor) {
- return function() {
- // Use a `switch` statement to work with class constructors. See
- // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
- // for more details.
- var args = arguments;
- switch (args.length) {
- case 0: return new Ctor;
- case 1: return new Ctor(args[0]);
- case 2: return new Ctor(args[0], args[1]);
- case 3: return new Ctor(args[0], args[1], args[2]);
- case 4: return new Ctor(args[0], args[1], args[2], args[3]);
- case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
- case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
- case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
- }
- var thisBinding = baseCreate(Ctor.prototype),
- result = Ctor.apply(thisBinding, args);
-
- // Mimic the constructor's `return` behavior.
- // See https://es5.github.io/#x13.2.2 for more details.
- return isObject(result) ? result : thisBinding;
- };
- }
-
- /**
- * Creates a function that wraps `func` to enable currying.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {number} arity The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createCurry(func, bitmask, arity) {
- var Ctor = createCtor(func);
-
- function wrapper() {
- var length = arguments.length,
- args = Array(length),
- index = length,
- placeholder = getHolder(wrapper);
-
- while (index--) {
- args[index] = arguments[index];
- }
- var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
- ? []
- : replaceHolders(args, placeholder);
-
- length -= holders.length;
- if (length < arity) {
- return createRecurry(
- func, bitmask, createHybrid, wrapper.placeholder, undefined,
- args, holders, undefined, undefined, arity - length);
- }
- var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- return apply(fn, this, args);
- }
- return wrapper;
- }
-
- /**
- * Creates a `_.find` or `_.findLast` function.
- *
- * @private
- * @param {Function} findIndexFunc The function to find the collection index.
- * @returns {Function} Returns the new find function.
- */
- function createFind(findIndexFunc) {
- return function(collection, predicate, fromIndex) {
- var iterable = Object(collection);
- if (!isArrayLike(collection)) {
- var iteratee = getIteratee(predicate, 3);
- collection = keys(collection);
- predicate = function(key) { return iteratee(iterable[key], key, iterable); };
- }
- var index = findIndexFunc(collection, predicate, fromIndex);
- return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
- };
- }
-
- /**
- * Creates a `_.flow` or `_.flowRight` function.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new flow function.
- */
- function createFlow(fromRight) {
- return baseRest(function(funcs) {
- funcs = baseFlatten(funcs, 1);
-
- var length = funcs.length,
- index = length,
- prereq = LodashWrapper.prototype.thru;
-
- if (fromRight) {
- funcs.reverse();
- }
- while (index--) {
- var func = funcs[index];
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
- var wrapper = new LodashWrapper([], true);
- }
- }
- index = wrapper ? index : length;
- while (++index < length) {
- func = funcs[index];
-
- var funcName = getFuncName(func),
- data = funcName == 'wrapper' ? getData(func) : undefined;
-
- if (data && isLaziable(data[0]) &&
- data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) &&
- !data[4].length && data[9] == 1
- ) {
- wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
- } else {
- wrapper = (func.length == 1 && isLaziable(func))
- ? wrapper[funcName]()
- : wrapper.thru(func);
- }
- }
- return function() {
- var args = arguments,
- value = args[0];
-
- if (wrapper && args.length == 1 &&
- isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
- return wrapper.plant(value).value();
- }
- var index = 0,
- result = length ? funcs[index].apply(this, args) : value;
-
- while (++index < length) {
- result = funcs[index].call(this, result);
- }
- return result;
- };
- });
- }
-
- /**
- * Creates a function that wraps `func` to invoke it with optional `this`
- * binding of `thisArg`, partial application, and currying.
- *
- * @private
- * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to
- * the new function.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [partialsRight] The arguments to append to those provided
- * to the new function.
- * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
- var isAry = bitmask & ARY_FLAG,
- isBind = bitmask & BIND_FLAG,
- isBindKey = bitmask & BIND_KEY_FLAG,
- isCurried = bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG),
- isFlip = bitmask & FLIP_FLAG,
- Ctor = isBindKey ? undefined : createCtor(func);
-
- function wrapper() {
- var length = arguments.length,
- args = Array(length),
- index = length;
-
- while (index--) {
- args[index] = arguments[index];
- }
- if (isCurried) {
- var placeholder = getHolder(wrapper),
- holdersCount = countHolders(args, placeholder);
- }
- if (partials) {
- args = composeArgs(args, partials, holders, isCurried);
- }
- if (partialsRight) {
- args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
- }
- length -= holdersCount;
- if (isCurried && length < arity) {
- var newHolders = replaceHolders(args, placeholder);
- return createRecurry(
- func, bitmask, createHybrid, wrapper.placeholder, thisArg,
- args, newHolders, argPos, ary, arity - length
- );
- }
- var thisBinding = isBind ? thisArg : this,
- fn = isBindKey ? thisBinding[func] : func;
-
- length = args.length;
- if (argPos) {
- args = reorder(args, argPos);
- } else if (isFlip && length > 1) {
- args.reverse();
- }
- if (isAry && ary < length) {
- args.length = ary;
- }
- if (this && this !== root && this instanceof wrapper) {
- fn = Ctor || createCtor(fn);
- }
- return fn.apply(thisBinding, args);
- }
- return wrapper;
- }
-
- /**
- * Creates a function like `_.invertBy`.
- *
- * @private
- * @param {Function} setter The function to set accumulator values.
- * @param {Function} toIteratee The function to resolve iteratees.
- * @returns {Function} Returns the new inverter function.
- */
- function createInverter(setter, toIteratee) {
- return function(object, iteratee) {
- return baseInverter(object, setter, toIteratee(iteratee), {});
- };
- }
-
- /**
- * Creates a function that performs a mathematical operation on two values.
- *
- * @private
- * @param {Function} operator The function to perform the operation.
- * @param {number} [defaultValue] The value used for `undefined` arguments.
- * @returns {Function} Returns the new mathematical operation function.
- */
- function createMathOperation(operator, defaultValue) {
- return function(value, other) {
- var result;
- if (value === undefined && other === undefined) {
- return defaultValue;
- }
- if (value !== undefined) {
- result = value;
- }
- if (other !== undefined) {
- if (result === undefined) {
- return other;
- }
- if (typeof value == 'string' || typeof other == 'string') {
- value = baseToString(value);
- other = baseToString(other);
- } else {
- value = baseToNumber(value);
- other = baseToNumber(other);
- }
- result = operator(value, other);
- }
- return result;
- };
- }
-
- /**
- * Creates a function like `_.over`.
- *
- * @private
- * @param {Function} arrayFunc The function to iterate over iteratees.
- * @returns {Function} Returns the new over function.
- */
- function createOver(arrayFunc) {
- return baseRest(function(iteratees) {
- iteratees = (iteratees.length == 1 && isArray(iteratees[0]))
- ? arrayMap(iteratees[0], baseUnary(getIteratee()))
- : arrayMap(baseFlatten(iteratees, 1), baseUnary(getIteratee()));
-
- return baseRest(function(args) {
- var thisArg = this;
- return arrayFunc(iteratees, function(iteratee) {
- return apply(iteratee, thisArg, args);
- });
- });
- });
- }
-
- /**
- * Creates the padding for `string` based on `length`. The `chars` string
- * is truncated if the number of characters exceeds `length`.
- *
- * @private
- * @param {number} length The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padding for `string`.
- */
- function createPadding(length, chars) {
- chars = chars === undefined ? ' ' : baseToString(chars);
-
- var charsLength = chars.length;
- if (charsLength < 2) {
- return charsLength ? baseRepeat(chars, length) : chars;
- }
- var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
- return hasUnicode(chars)
- ? castSlice(stringToArray(result), 0, length).join('')
- : result.slice(0, length);
- }
-
- /**
- * Creates a function that wraps `func` to invoke it with the `this` binding
- * of `thisArg` and `partials` prepended to the arguments it receives.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} partials The arguments to prepend to those provided to
- * the new function.
- * @returns {Function} Returns the new wrapped function.
- */
- function createPartial(func, bitmask, thisArg, partials) {
- var isBind = bitmask & BIND_FLAG,
- Ctor = createCtor(func);
-
- function wrapper() {
- var argsIndex = -1,
- argsLength = arguments.length,
- leftIndex = -1,
- leftLength = partials.length,
- args = Array(leftLength + argsLength),
- fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
-
- while (++leftIndex < leftLength) {
- args[leftIndex] = partials[leftIndex];
- }
- while (argsLength--) {
- args[leftIndex++] = arguments[++argsIndex];
- }
- return apply(fn, isBind ? thisArg : this, args);
- }
- return wrapper;
- }
-
- /**
- * Creates a `_.range` or `_.rangeRight` function.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new range function.
- */
- function createRange(fromRight) {
- return function(start, end, step) {
- if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
- end = step = undefined;
- }
- // Ensure the sign of `-0` is preserved.
- start = toFinite(start);
- if (end === undefined) {
- end = start;
- start = 0;
- } else {
- end = toFinite(end);
- }
- step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
- return baseRange(start, end, step, fromRight);
- };
- }
-
- /**
- * Creates a function that performs a relational operation on two values.
- *
- * @private
- * @param {Function} operator The function to perform the operation.
- * @returns {Function} Returns the new relational operation function.
- */
- function createRelationalOperation(operator) {
- return function(value, other) {
- if (!(typeof value == 'string' && typeof other == 'string')) {
- value = toNumber(value);
- other = toNumber(other);
- }
- return operator(value, other);
- };
- }
-
- /**
- * Creates a function that wraps `func` to continue currying.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {Function} wrapFunc The function to create the `func` wrapper.
- * @param {*} placeholder The placeholder value.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to
- * the new function.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
- var isCurry = bitmask & CURRY_FLAG,
- newHolders = isCurry ? holders : undefined,
- newHoldersRight = isCurry ? undefined : holders,
- newPartials = isCurry ? partials : undefined,
- newPartialsRight = isCurry ? undefined : partials;
-
- bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG);
- bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG);
-
- if (!(bitmask & CURRY_BOUND_FLAG)) {
- bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
- }
- var newData = [
- func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
- newHoldersRight, argPos, ary, arity
- ];
-
- var result = wrapFunc.apply(undefined, newData);
- if (isLaziable(func)) {
- setData(result, newData);
- }
- result.placeholder = placeholder;
- return setWrapToString(result, func, bitmask);
- }
-
- /**
- * Creates a function like `_.round`.
- *
- * @private
- * @param {string} methodName The name of the `Math` method to use when rounding.
- * @returns {Function} Returns the new round function.
- */
- function createRound(methodName) {
- var func = Math[methodName];
- return function(number, precision) {
- number = toNumber(number);
- precision = nativeMin(toInteger(precision), 292);
- if (precision) {
- // Shift with exponential notation to avoid floating-point issues.
- // See [MDN](https://mdn.io/round#Examples) for more details.
- var pair = (toString(number) + 'e').split('e'),
- value = func(pair[0] + 'e' + (+pair[1] + precision));
-
- pair = (toString(value) + 'e').split('e');
- return +(pair[0] + 'e' + (+pair[1] - precision));
- }
- return func(number);
- };
- }
-
- /**
- * Creates a set object of `values`.
- *
- * @private
- * @param {Array} values The values to add to the set.
- * @returns {Object} Returns the new set.
- */
- var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
- return new Set(values);
- };
-
- /**
- * Creates a `_.toPairs` or `_.toPairsIn` function.
- *
- * @private
- * @param {Function} keysFunc The function to get the keys of a given object.
- * @returns {Function} Returns the new pairs function.
- */
- function createToPairs(keysFunc) {
- return function(object) {
- var tag = getTag(object);
- if (tag == mapTag) {
- return mapToArray(object);
- }
- if (tag == setTag) {
- return setToPairs(object);
- }
- return baseToPairs(object, keysFunc(object));
- };
- }
-
- /**
- * Creates a function that either curries or invokes `func` with optional
- * `this` binding and partially applied arguments.
- *
- * @private
- * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask flags.
- * The bitmask may be composed of the following flags:
- * 1 - `_.bind`
- * 2 - `_.bindKey`
- * 4 - `_.curry` or `_.curryRight` of a bound function
- * 8 - `_.curry`
- * 16 - `_.curryRight`
- * 32 - `_.partial`
- * 64 - `_.partialRight`
- * 128 - `_.rearg`
- * 256 - `_.ary`
- * 512 - `_.flip`
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to be partially applied.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
- var isBindKey = bitmask & BIND_KEY_FLAG;
- if (!isBindKey && typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- var length = partials ? partials.length : 0;
- if (!length) {
- bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG);
- partials = holders = undefined;
- }
- ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
- arity = arity === undefined ? arity : toInteger(arity);
- length -= holders ? holders.length : 0;
-
- if (bitmask & PARTIAL_RIGHT_FLAG) {
- var partialsRight = partials,
- holdersRight = holders;
-
- partials = holders = undefined;
- }
- var data = isBindKey ? undefined : getData(func);
-
- var newData = [
- func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
- argPos, ary, arity
- ];
-
- if (data) {
- mergeData(newData, data);
- }
- func = newData[0];
- bitmask = newData[1];
- thisArg = newData[2];
- partials = newData[3];
- holders = newData[4];
- arity = newData[9] = newData[9] == null
- ? (isBindKey ? 0 : func.length)
- : nativeMax(newData[9] - length, 0);
-
- if (!arity && bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG)) {
- bitmask &= ~(CURRY_FLAG | CURRY_RIGHT_FLAG);
- }
- if (!bitmask || bitmask == BIND_FLAG) {
- var result = createBind(func, bitmask, thisArg);
- } else if (bitmask == CURRY_FLAG || bitmask == CURRY_RIGHT_FLAG) {
- result = createCurry(func, bitmask, arity);
- } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !holders.length) {
- result = createPartial(func, bitmask, thisArg, partials);
- } else {
- result = createHybrid.apply(undefined, newData);
- }
- var setter = data ? baseSetData : setData;
- return setWrapToString(setter(result, newData), func, bitmask);
- }
-
- /**
- * A specialized version of `baseIsEqualDeep` for arrays with support for
- * partial deep comparisons.
- *
- * @private
- * @param {Array} array The array to compare.
- * @param {Array} other The other array to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
- * for more details.
- * @param {Object} stack Tracks traversed `array` and `other` objects.
- * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
- */
- function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
- var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
- arrLength = array.length,
- othLength = other.length;
-
- if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
- return false;
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(array);
- if (stacked && stack.get(other)) {
- return stacked == other;
- }
- var index = -1,
- result = true,
- seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
-
- stack.set(array, other);
- stack.set(other, array);
-
- // Ignore non-index properties.
- while (++index < arrLength) {
- var arrValue = array[index],
- othValue = other[index];
-
- if (customizer) {
- var compared = isPartial
- ? customizer(othValue, arrValue, index, other, array, stack)
- : customizer(arrValue, othValue, index, array, other, stack);
- }
- if (compared !== undefined) {
- if (compared) {
- continue;
- }
- result = false;
- break;
- }
- // Recursively compare arrays (susceptible to call stack limits).
- if (seen) {
- if (!arraySome(other, function(othValue, othIndex) {
- if (!seen.has(othIndex) &&
- (arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
- return seen.add(othIndex);
- }
- })) {
- result = false;
- break;
- }
- } else if (!(
- arrValue === othValue ||
- equalFunc(arrValue, othValue, customizer, bitmask, stack)
- )) {
- result = false;
- break;
- }
- }
- stack['delete'](array);
- stack['delete'](other);
- return result;
- }
-
- /**
- * A specialized version of `baseIsEqualDeep` for comparing objects of
- * the same `toStringTag`.
- *
- * **Note:** This function only supports comparing values with tags of
- * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {string} tag The `toStringTag` of the objects to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
- * for more details.
- * @param {Object} stack Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
- switch (tag) {
- case dataViewTag:
- if ((object.byteLength != other.byteLength) ||
- (object.byteOffset != other.byteOffset)) {
- return false;
- }
- object = object.buffer;
- other = other.buffer;
-
- case arrayBufferTag:
- if ((object.byteLength != other.byteLength) ||
- !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
- return false;
- }
- return true;
-
- case boolTag:
- case dateTag:
- case numberTag:
- // Coerce booleans to `1` or `0` and dates to milliseconds.
- // Invalid dates are coerced to `NaN`.
- return eq(+object, +other);
-
- case errorTag:
- return object.name == other.name && object.message == other.message;
-
- case regexpTag:
- case stringTag:
- // Coerce regexes to strings and treat strings, primitives and objects,
- // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
- // for more details.
- return object == (other + '');
-
- case mapTag:
- var convert = mapToArray;
-
- case setTag:
- var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
- convert || (convert = setToArray);
-
- if (object.size != other.size && !isPartial) {
- return false;
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(object);
- if (stacked) {
- return stacked == other;
- }
- bitmask |= UNORDERED_COMPARE_FLAG;
-
- // Recursively compare objects (susceptible to call stack limits).
- stack.set(object, other);
- var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
- stack['delete'](object);
- return result;
-
- case symbolTag:
- if (symbolValueOf) {
- return symbolValueOf.call(object) == symbolValueOf.call(other);
- }
- }
- return false;
- }
-
- /**
- * A specialized version of `baseIsEqualDeep` for objects with support for
- * partial deep comparisons.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
- * for more details.
- * @param {Object} stack Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
- var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
- objProps = keys(object),
- objLength = objProps.length,
- othProps = keys(other),
- othLength = othProps.length;
-
- if (objLength != othLength && !isPartial) {
- return false;
- }
- var index = objLength;
- while (index--) {
- var key = objProps[index];
- if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
- return false;
- }
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(object);
- if (stacked && stack.get(other)) {
- return stacked == other;
- }
- var result = true;
- stack.set(object, other);
- stack.set(other, object);
-
- var skipCtor = isPartial;
- while (++index < objLength) {
- key = objProps[index];
- var objValue = object[key],
- othValue = other[key];
-
- if (customizer) {
- var compared = isPartial
- ? customizer(othValue, objValue, key, other, object, stack)
- : customizer(objValue, othValue, key, object, other, stack);
- }
- // Recursively compare objects (susceptible to call stack limits).
- if (!(compared === undefined
- ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
- : compared
- )) {
- result = false;
- break;
- }
- skipCtor || (skipCtor = key == 'constructor');
- }
- if (result && !skipCtor) {
- var objCtor = object.constructor,
- othCtor = other.constructor;
-
- // Non `Object` object instances with different constructors are not equal.
- if (objCtor != othCtor &&
- ('constructor' in object && 'constructor' in other) &&
- !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
- typeof othCtor == 'function' && othCtor instanceof othCtor)) {
- result = false;
- }
- }
- stack['delete'](object);
- stack['delete'](other);
- return result;
- }
-
- /**
- * Creates an array of own enumerable property names and symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names and symbols.
- */
- function getAllKeys(object) {
- return baseGetAllKeys(object, keys, getSymbols);
- }
-
- /**
- * Creates an array of own and inherited enumerable property names and
- * symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names and symbols.
- */
- function getAllKeysIn(object) {
- return baseGetAllKeys(object, keysIn, getSymbolsIn);
- }
-
- /**
- * Gets metadata for `func`.
- *
- * @private
- * @param {Function} func The function to query.
- * @returns {*} Returns the metadata for `func`.
- */
- var getData = !metaMap ? noop : function(func) {
- return metaMap.get(func);
- };
-
- /**
- * Gets the name of `func`.
- *
- * @private
- * @param {Function} func The function to query.
- * @returns {string} Returns the function name.
- */
- function getFuncName(func) {
- var result = (func.name + ''),
- array = realNames[result],
- length = hasOwnProperty.call(realNames, result) ? array.length : 0;
-
- while (length--) {
- var data = array[length],
- otherFunc = data.func;
- if (otherFunc == null || otherFunc == func) {
- return data.name;
- }
- }
- return result;
- }
-
- /**
- * Gets the argument placeholder value for `func`.
- *
- * @private
- * @param {Function} func The function to inspect.
- * @returns {*} Returns the placeholder value.
- */
- function getHolder(func) {
- var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
- return object.placeholder;
- }
-
- /**
- * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
- * this function returns the custom method, otherwise it returns `baseIteratee`.
- * If arguments are provided, the chosen function is invoked with them and
- * its result is returned.
- *
- * @private
- * @param {*} [value] The value to convert to an iteratee.
- * @param {number} [arity] The arity of the created iteratee.
- * @returns {Function} Returns the chosen function or its result.
- */
- function getIteratee() {
- var result = lodash.iteratee || iteratee;
- result = result === iteratee ? baseIteratee : result;
- return arguments.length ? result(arguments[0], arguments[1]) : result;
- }
-
- /**
- * Gets the data for `map`.
- *
- * @private
- * @param {Object} map The map to query.
- * @param {string} key The reference key.
- * @returns {*} Returns the map data.
- */
- function getMapData(map, key) {
- var data = map.__data__;
- return isKeyable(key)
- ? data[typeof key == 'string' ? 'string' : 'hash']
- : data.map;
- }
-
- /**
- * Gets the property names, values, and compare flags of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the match data of `object`.
- */
- function getMatchData(object) {
- var result = keys(object),
- length = result.length;
-
- while (length--) {
- var key = result[length],
- value = object[key];
-
- result[length] = [key, value, isStrictComparable(value)];
- }
- return result;
- }
-
- /**
- * Gets the native function at `key` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {string} key The key of the method to get.
- * @returns {*} Returns the function if it's native, else `undefined`.
- */
- function getNative(object, key) {
- var value = getValue(object, key);
- return baseIsNative(value) ? value : undefined;
- }
-
- /**
- * Creates an array of the own enumerable symbol properties of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of symbols.
- */
- var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
-
- /**
- * Creates an array of the own and inherited enumerable symbol properties
- * of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of symbols.
- */
- var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
- var result = [];
- while (object) {
- arrayPush(result, getSymbols(object));
- object = getPrototype(object);
- }
- return result;
- };
-
- /**
- * Gets the `toStringTag` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
- */
- var getTag = baseGetTag;
-
- // Fallback for data views, maps, sets, and weak maps in IE 11,
- // for data views in Edge < 14, and promises in Node.js.
- if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
- (Map && getTag(new Map) != mapTag) ||
- (Promise && getTag(Promise.resolve()) != promiseTag) ||
- (Set && getTag(new Set) != setTag) ||
- (WeakMap && getTag(new WeakMap) != weakMapTag)) {
- getTag = function(value) {
- var result = objectToString.call(value),
- Ctor = result == objectTag ? value.constructor : undefined,
- ctorString = Ctor ? toSource(Ctor) : undefined;
-
- if (ctorString) {
- switch (ctorString) {
- case dataViewCtorString: return dataViewTag;
- case mapCtorString: return mapTag;
- case promiseCtorString: return promiseTag;
- case setCtorString: return setTag;
- case weakMapCtorString: return weakMapTag;
- }
- }
- return result;
- };
- }
-
- /**
- * Gets the view, applying any `transforms` to the `start` and `end` positions.
- *
- * @private
- * @param {number} start The start of the view.
- * @param {number} end The end of the view.
- * @param {Array} transforms The transformations to apply to the view.
- * @returns {Object} Returns an object containing the `start` and `end`
- * positions of the view.
- */
- function getView(start, end, transforms) {
- var index = -1,
- length = transforms.length;
-
- while (++index < length) {
- var data = transforms[index],
- size = data.size;
-
- switch (data.type) {
- case 'drop': start += size; break;
- case 'dropRight': end -= size; break;
- case 'take': end = nativeMin(end, start + size); break;
- case 'takeRight': start = nativeMax(start, end - size); break;
- }
- }
- return { 'start': start, 'end': end };
- }
-
- /**
- * Extracts wrapper details from the `source` body comment.
- *
- * @private
- * @param {string} source The source to inspect.
- * @returns {Array} Returns the wrapper details.
- */
- function getWrapDetails(source) {
- var match = source.match(reWrapDetails);
- return match ? match[1].split(reSplitDetails) : [];
- }
-
- /**
- * Checks if `path` exists on `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @param {Function} hasFunc The function to check properties.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
- */
- function hasPath(object, path, hasFunc) {
- path = isKey(path, object) ? [path] : castPath(path);
-
- var result,
- index = -1,
- length = path.length;
-
- while (++index < length) {
- var key = toKey(path[index]);
- if (!(result = object != null && hasFunc(object, key))) {
- break;
- }
- object = object[key];
- }
- if (result) {
- return result;
- }
- var length = object ? object.length : 0;
- return !!length && isLength(length) && isIndex(key, length) &&
- (isArray(object) || isArguments(object));
- }
-
- /**
- * Initializes an array clone.
- *
- * @private
- * @param {Array} array The array to clone.
- * @returns {Array} Returns the initialized clone.
- */
- function initCloneArray(array) {
- var length = array.length,
- result = array.constructor(length);
-
- // Add properties assigned by `RegExp#exec`.
- if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
- result.index = array.index;
- result.input = array.input;
- }
- return result;
- }
-
- /**
- * Initializes an object clone.
- *
- * @private
- * @param {Object} object The object to clone.
- * @returns {Object} Returns the initialized clone.
- */
- function initCloneObject(object) {
- return (typeof object.constructor == 'function' && !isPrototype(object))
- ? baseCreate(getPrototype(object))
- : {};
- }
-
- /**
- * Initializes an object clone based on its `toStringTag`.
- *
- * **Note:** This function only supports cloning values with tags of
- * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
- *
- * @private
- * @param {Object} object The object to clone.
- * @param {string} tag The `toStringTag` of the object to clone.
- * @param {Function} cloneFunc The function to clone values.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the initialized clone.
- */
- function initCloneByTag(object, tag, cloneFunc, isDeep) {
- var Ctor = object.constructor;
- switch (tag) {
- case arrayBufferTag:
- return cloneArrayBuffer(object);
-
- case boolTag:
- case dateTag:
- return new Ctor(+object);
-
- case dataViewTag:
- return cloneDataView(object, isDeep);
-
- case float32Tag: case float64Tag:
- case int8Tag: case int16Tag: case int32Tag:
- case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
- return cloneTypedArray(object, isDeep);
-
- case mapTag:
- return cloneMap(object, isDeep, cloneFunc);
-
- case numberTag:
- case stringTag:
- return new Ctor(object);
-
- case regexpTag:
- return cloneRegExp(object);
-
- case setTag:
- return cloneSet(object, isDeep, cloneFunc);
-
- case symbolTag:
- return cloneSymbol(object);
- }
- }
-
- /**
- * Inserts wrapper `details` in a comment at the top of the `source` body.
- *
- * @private
- * @param {string} source The source to modify.
- * @returns {Array} details The details to insert.
- * @returns {string} Returns the modified source.
- */
- function insertWrapDetails(source, details) {
- var length = details.length,
- lastIndex = length - 1;
-
- details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
- details = details.join(length > 2 ? ', ' : ' ');
- return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
- }
-
- /**
- * Checks if `value` is a flattenable `arguments` object or array.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
- */
- function isFlattenable(value) {
- return isArray(value) || isArguments(value) ||
- !!(spreadableSymbol && value && value[spreadableSymbol]);
- }
-
- /**
- * Checks if `value` is a valid array-like index.
- *
- * @private
- * @param {*} value The value to check.
- * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
- * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
- */
- function isIndex(value, length) {
- length = length == null ? MAX_SAFE_INTEGER : length;
- return !!length &&
- (typeof value == 'number' || reIsUint.test(value)) &&
- (value > -1 && value % 1 == 0 && value < length);
- }
-
- /**
- * Checks if the given arguments are from an iteratee call.
- *
- * @private
- * @param {*} value The potential iteratee value argument.
- * @param {*} index The potential iteratee index or key argument.
- * @param {*} object The potential iteratee object argument.
- * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
- * else `false`.
- */
- function isIterateeCall(value, index, object) {
- if (!isObject(object)) {
- return false;
- }
- var type = typeof index;
- if (type == 'number'
- ? (isArrayLike(object) && isIndex(index, object.length))
- : (type == 'string' && index in object)
- ) {
- return eq(object[index], value);
- }
- return false;
- }
-
- /**
- * Checks if `value` is a property name and not a property path.
- *
- * @private
- * @param {*} value The value to check.
- * @param {Object} [object] The object to query keys on.
- * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
- */
- function isKey(value, object) {
- if (isArray(value)) {
- return false;
- }
- var type = typeof value;
- if (type == 'number' || type == 'symbol' || type == 'boolean' ||
- value == null || isSymbol(value)) {
- return true;
- }
- return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
- (object != null && value in Object(object));
- }
-
- /**
- * Checks if `value` is suitable for use as unique object key.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
- */
- function isKeyable(value) {
- var type = typeof value;
- return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
- ? (value !== '__proto__')
- : (value === null);
- }
-
- /**
- * Checks if `func` has a lazy counterpart.
- *
- * @private
- * @param {Function} func The function to check.
- * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
- * else `false`.
- */
- function isLaziable(func) {
- var funcName = getFuncName(func),
- other = lodash[funcName];
-
- if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
- return false;
- }
- if (func === other) {
- return true;
- }
- var data = getData(other);
- return !!data && func === data[0];
- }
-
- /**
- * Checks if `func` has its source masked.
- *
- * @private
- * @param {Function} func The function to check.
- * @returns {boolean} Returns `true` if `func` is masked, else `false`.
- */
- function isMasked(func) {
- return !!maskSrcKey && (maskSrcKey in func);
- }
-
- /**
- * Checks if `func` is capable of being masked.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
- */
- var isMaskable = coreJsData ? isFunction : stubFalse;
-
- /**
- * Checks if `value` is likely a prototype object.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
- */
- function isPrototype(value) {
- var Ctor = value && value.constructor,
- proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
-
- return value === proto;
- }
-
- /**
- * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` if suitable for strict
- * equality comparisons, else `false`.
- */
- function isStrictComparable(value) {
- return value === value && !isObject(value);
- }
-
- /**
- * A specialized version of `matchesProperty` for source values suitable
- * for strict equality comparisons, i.e. `===`.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new spec function.
- */
- function matchesStrictComparable(key, srcValue) {
- return function(object) {
- if (object == null) {
- return false;
- }
- return object[key] === srcValue &&
- (srcValue !== undefined || (key in Object(object)));
- };
- }
-
- /**
- * Merges the function metadata of `source` into `data`.
- *
- * Merging metadata reduces the number of wrappers used to invoke a function.
- * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
- * may be applied regardless of execution order. Methods like `_.ary` and
- * `_.rearg` modify function arguments, making the order in which they are
- * executed important, preventing the merging of metadata. However, we make
- * an exception for a safe combined case where curried functions have `_.ary`
- * and or `_.rearg` applied.
- *
- * @private
- * @param {Array} data The destination metadata.
- * @param {Array} source The source metadata.
- * @returns {Array} Returns `data`.
- */
- function mergeData(data, source) {
- var bitmask = data[1],
- srcBitmask = source[1],
- newBitmask = bitmask | srcBitmask,
- isCommon = newBitmask < (BIND_FLAG | BIND_KEY_FLAG | ARY_FLAG);
-
- var isCombo =
- ((srcBitmask == ARY_FLAG) && (bitmask == CURRY_FLAG)) ||
- ((srcBitmask == ARY_FLAG) && (bitmask == REARG_FLAG) && (data[7].length <= source[8])) ||
- ((srcBitmask == (ARY_FLAG | REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG));
-
- // Exit early if metadata can't be merged.
- if (!(isCommon || isCombo)) {
- return data;
- }
- // Use source `thisArg` if available.
- if (srcBitmask & BIND_FLAG) {
- data[2] = source[2];
- // Set when currying a bound function.
- newBitmask |= bitmask & BIND_FLAG ? 0 : CURRY_BOUND_FLAG;
- }
- // Compose partial arguments.
- var value = source[3];
- if (value) {
- var partials = data[3];
- data[3] = partials ? composeArgs(partials, value, source[4]) : value;
- data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
- }
- // Compose partial right arguments.
- value = source[5];
- if (value) {
- partials = data[5];
- data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
- data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
- }
- // Use source `argPos` if available.
- value = source[7];
- if (value) {
- data[7] = value;
- }
- // Use source `ary` if it's smaller.
- if (srcBitmask & ARY_FLAG) {
- data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
- }
- // Use source `arity` if one is not provided.
- if (data[9] == null) {
- data[9] = source[9];
- }
- // Use source `func` and merge bitmasks.
- data[0] = source[0];
- data[1] = newBitmask;
-
- return data;
- }
-
- /**
- * Used by `_.defaultsDeep` to customize its `_.merge` use.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to merge.
- * @param {Object} object The parent object of `objValue`.
- * @param {Object} source The parent object of `srcValue`.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- * @returns {*} Returns the value to assign.
- */
- function mergeDefaults(objValue, srcValue, key, object, source, stack) {
- if (isObject(objValue) && isObject(srcValue)) {
- // Recursively merge objects and arrays (susceptible to call stack limits).
- stack.set(srcValue, objValue);
- baseMerge(objValue, srcValue, undefined, mergeDefaults, stack);
- stack['delete'](srcValue);
- }
- return objValue;
- }
-
- /**
- * This function is like
- * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
- * except that it includes inherited enumerable properties.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function nativeKeysIn(object) {
- var result = [];
- if (object != null) {
- for (var key in Object(object)) {
- result.push(key);
- }
- }
- return result;
- }
-
- /**
- * Gets the parent value at `path` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} path The path to get the parent value of.
- * @returns {*} Returns the parent value.
- */
- function parent(object, path) {
- return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
- }
-
- /**
- * Reorder `array` according to the specified indexes where the element at
- * the first index is assigned as the first element, the element at
- * the second index is assigned as the second element, and so on.
- *
- * @private
- * @param {Array} array The array to reorder.
- * @param {Array} indexes The arranged array indexes.
- * @returns {Array} Returns `array`.
- */
- function reorder(array, indexes) {
- var arrLength = array.length,
- length = nativeMin(indexes.length, arrLength),
- oldArray = copyArray(array);
-
- while (length--) {
- var index = indexes[length];
- array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
- }
- return array;
- }
-
- /**
- * Sets metadata for `func`.
- *
- * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
- * period of time, it will trip its breaker and transition to an identity
- * function to avoid garbage collection pauses in V8. See
- * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
- * for more details.
- *
- * @private
- * @param {Function} func The function to associate metadata with.
- * @param {*} data The metadata.
- * @returns {Function} Returns `func`.
- */
- var setData = (function() {
- var count = 0,
- lastCalled = 0;
-
- return function(key, value) {
- var stamp = now(),
- remaining = HOT_SPAN - (stamp - lastCalled);
-
- lastCalled = stamp;
- if (remaining > 0) {
- if (++count >= HOT_COUNT) {
- return key;
- }
- } else {
- count = 0;
- }
- return baseSetData(key, value);
- };
- }());
-
- /**
- * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
- *
- * @private
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @returns {number|Object} Returns the timer id or timeout object.
- */
- var setTimeout = ctxSetTimeout || function(func, wait) {
- return root.setTimeout(func, wait);
- };
-
- /**
- * Sets the `toString` method of `wrapper` to mimic the source of `reference`
- * with wrapper details in a comment at the top of the source body.
- *
- * @private
- * @param {Function} wrapper The function to modify.
- * @param {Function} reference The reference function.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @returns {Function} Returns `wrapper`.
- */
- var setWrapToString = !defineProperty ? identity : function(wrapper, reference, bitmask) {
- var source = (reference + '');
- return defineProperty(wrapper, 'toString', {
- 'configurable': true,
- 'enumerable': false,
- 'value': constant(insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)))
- });
- };
-
- /**
- * Converts `string` to a property path array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the property path array.
- */
- var stringToPath = memoize(function(string) {
- string = toString(string);
-
- var result = [];
- if (reLeadingDot.test(string)) {
- result.push('');
- }
- string.replace(rePropName, function(match, number, quote, string) {
- result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
- });
- return result;
- });
-
- /**
- * Converts `value` to a string key if it's not a string or symbol.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {string|symbol} Returns the key.
- */
- function toKey(value) {
- if (typeof value == 'string' || isSymbol(value)) {
- return value;
- }
- var result = (value + '');
- return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
- }
-
- /**
- * Converts `func` to its source code.
- *
- * @private
- * @param {Function} func The function to process.
- * @returns {string} Returns the source code.
- */
- function toSource(func) {
- if (func != null) {
- try {
- return funcToString.call(func);
- } catch (e) {}
- try {
- return (func + '');
- } catch (e) {}
- }
- return '';
- }
-
- /**
- * Updates wrapper `details` based on `bitmask` flags.
- *
- * @private
- * @returns {Array} details The details to modify.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @returns {Array} Returns `details`.
- */
- function updateWrapDetails(details, bitmask) {
- arrayEach(wrapFlags, function(pair) {
- var value = '_.' + pair[0];
- if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
- details.push(value);
- }
- });
- return details.sort();
- }
-
- /**
- * Creates a clone of `wrapper`.
- *
- * @private
- * @param {Object} wrapper The wrapper to clone.
- * @returns {Object} Returns the cloned wrapper.
- */
- function wrapperClone(wrapper) {
- if (wrapper instanceof LazyWrapper) {
- return wrapper.clone();
- }
- var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
- result.__actions__ = copyArray(wrapper.__actions__);
- result.__index__ = wrapper.__index__;
- result.__values__ = wrapper.__values__;
- return result;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an array of elements split into groups the length of `size`.
- * If `array` can't be split evenly, the final chunk will be the remaining
- * elements.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to process.
- * @param {number} [size=1] The length of each chunk
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the new array of chunks.
- * @example
- *
- * _.chunk(['a', 'b', 'c', 'd'], 2);
- * // => [['a', 'b'], ['c', 'd']]
- *
- * _.chunk(['a', 'b', 'c', 'd'], 3);
- * // => [['a', 'b', 'c'], ['d']]
- */
- function chunk(array, size, guard) {
- if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
- size = 1;
- } else {
- size = nativeMax(toInteger(size), 0);
- }
- var length = array ? array.length : 0;
- if (!length || size < 1) {
- return [];
- }
- var index = 0,
- resIndex = 0,
- result = Array(nativeCeil(length / size));
-
- while (index < length) {
- result[resIndex++] = baseSlice(array, index, (index += size));
- }
- return result;
- }
-
- /**
- * Creates an array with all falsey values removed. The values `false`, `null`,
- * `0`, `""`, `undefined`, and `NaN` are falsey.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to compact.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.compact([0, 1, false, 2, '', 3]);
- * // => [1, 2, 3]
- */
- function compact(array) {
- var index = -1,
- length = array ? array.length : 0,
- resIndex = 0,
- result = [];
-
- while (++index < length) {
- var value = array[index];
- if (value) {
- result[resIndex++] = value;
- }
- }
- return result;
- }
-
- /**
- * Creates a new array concatenating `array` with any additional arrays
- * and/or values.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to concatenate.
- * @param {...*} [values] The values to concatenate.
- * @returns {Array} Returns the new concatenated array.
- * @example
- *
- * var array = [1];
- * var other = _.concat(array, 2, [3], [[4]]);
- *
- * console.log(other);
- * // => [1, 2, 3, [4]]
- *
- * console.log(array);
- * // => [1]
- */
- function concat() {
- var length = arguments.length,
- args = Array(length ? length - 1 : 0),
- array = arguments[0],
- index = length;
-
- while (index--) {
- args[index - 1] = arguments[index];
- }
- return length
- ? arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1))
- : [];
- }
-
- /**
- * Creates an array of `array` values not included in the other given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons. The order of result values is determined by the
- * order they occur in the first array.
- *
- * **Note:** Unlike `_.pullAll`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @returns {Array} Returns the new array of filtered values.
- * @see _.without, _.xor
- * @example
- *
- * _.difference([2, 1], [2, 3]);
- * // => [1]
- */
- var difference = baseRest(function(array, values) {
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
- : [];
- });
-
- /**
- * This method is like `_.difference` except that it accepts `iteratee` which
- * is invoked for each element of `array` and `values` to generate the criterion
- * by which they're compared. Result values are chosen from the first array.
- * The iteratee is invoked with one argument: (value).
- *
- * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
- * // => [1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
- * // => [{ 'x': 2 }]
- */
- var differenceBy = baseRest(function(array, values) {
- var iteratee = last(values);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
- : [];
- });
-
- /**
- * This method is like `_.difference` except that it accepts `comparator`
- * which is invoked to compare elements of `array` to `values`. Result values
- * are chosen from the first array. The comparator is invoked with two arguments:
- * (arrVal, othVal).
- *
- * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- *
- * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
- * // => [{ 'x': 2, 'y': 1 }]
- */
- var differenceWith = baseRest(function(array, values) {
- var comparator = last(values);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
- : [];
- });
-
- /**
- * Creates a slice of `array` with `n` elements dropped from the beginning.
- *
- * @static
- * @memberOf _
- * @since 0.5.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.drop([1, 2, 3]);
- * // => [2, 3]
- *
- * _.drop([1, 2, 3], 2);
- * // => [3]
- *
- * _.drop([1, 2, 3], 5);
- * // => []
- *
- * _.drop([1, 2, 3], 0);
- * // => [1, 2, 3]
- */
- function drop(array, n, guard) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- return baseSlice(array, n < 0 ? 0 : n, length);
- }
-
- /**
- * Creates a slice of `array` with `n` elements dropped from the end.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.dropRight([1, 2, 3]);
- * // => [1, 2]
- *
- * _.dropRight([1, 2, 3], 2);
- * // => [1]
- *
- * _.dropRight([1, 2, 3], 5);
- * // => []
- *
- * _.dropRight([1, 2, 3], 0);
- * // => [1, 2, 3]
- */
- function dropRight(array, n, guard) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- n = length - n;
- return baseSlice(array, 0, n < 0 ? 0 : n);
- }
-
- /**
- * Creates a slice of `array` excluding elements dropped from the end.
- * Elements are dropped until `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.dropRightWhile(users, function(o) { return !o.active; });
- * // => objects for ['barney']
- *
- * // The `_.matches` iteratee shorthand.
- * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
- * // => objects for ['barney', 'fred']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.dropRightWhile(users, ['active', false]);
- * // => objects for ['barney']
- *
- * // The `_.property` iteratee shorthand.
- * _.dropRightWhile(users, 'active');
- * // => objects for ['barney', 'fred', 'pebbles']
- */
- function dropRightWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), true, true)
- : [];
- }
-
- /**
- * Creates a slice of `array` excluding elements dropped from the beginning.
- * Elements are dropped until `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.dropWhile(users, function(o) { return !o.active; });
- * // => objects for ['pebbles']
- *
- * // The `_.matches` iteratee shorthand.
- * _.dropWhile(users, { 'user': 'barney', 'active': false });
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.dropWhile(users, ['active', false]);
- * // => objects for ['pebbles']
- *
- * // The `_.property` iteratee shorthand.
- * _.dropWhile(users, 'active');
- * // => objects for ['barney', 'fred', 'pebbles']
- */
- function dropWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), true)
- : [];
- }
-
- /**
- * Fills elements of `array` with `value` from `start` up to, but not
- * including, `end`.
- *
- * **Note:** This method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 3.2.0
- * @category Array
- * @param {Array} array The array to fill.
- * @param {*} value The value to fill `array` with.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _.fill(array, 'a');
- * console.log(array);
- * // => ['a', 'a', 'a']
- *
- * _.fill(Array(3), 2);
- * // => [2, 2, 2]
- *
- * _.fill([4, 6, 8, 10], '*', 1, 3);
- * // => [4, '*', '*', 10]
- */
- function fill(array, value, start, end) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
- start = 0;
- end = length;
- }
- return baseFill(array, value, start, end);
- }
-
- /**
- * This method is like `_.find` except that it returns the index of the first
- * element `predicate` returns truthy for instead of the element itself.
- *
- * @static
- * @memberOf _
- * @since 1.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {number} Returns the index of the found element, else `-1`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.findIndex(users, function(o) { return o.user == 'barney'; });
- * // => 0
- *
- * // The `_.matches` iteratee shorthand.
- * _.findIndex(users, { 'user': 'fred', 'active': false });
- * // => 1
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findIndex(users, ['active', false]);
- * // => 0
- *
- * // The `_.property` iteratee shorthand.
- * _.findIndex(users, 'active');
- * // => 2
- */
- function findIndex(array, predicate, fromIndex) {
- var length = array ? array.length : 0;
- if (!length) {
- return -1;
- }
- var index = fromIndex == null ? 0 : toInteger(fromIndex);
- if (index < 0) {
- index = nativeMax(length + index, 0);
- }
- return baseFindIndex(array, getIteratee(predicate, 3), index);
- }
-
- /**
- * This method is like `_.findIndex` except that it iterates over elements
- * of `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @param {number} [fromIndex=array.length-1] The index to search from.
- * @returns {number} Returns the index of the found element, else `-1`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
- * // => 2
- *
- * // The `_.matches` iteratee shorthand.
- * _.findLastIndex(users, { 'user': 'barney', 'active': true });
- * // => 0
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findLastIndex(users, ['active', false]);
- * // => 2
- *
- * // The `_.property` iteratee shorthand.
- * _.findLastIndex(users, 'active');
- * // => 0
- */
- function findLastIndex(array, predicate, fromIndex) {
- var length = array ? array.length : 0;
- if (!length) {
- return -1;
- }
- var index = length - 1;
- if (fromIndex !== undefined) {
- index = toInteger(fromIndex);
- index = fromIndex < 0
- ? nativeMax(length + index, 0)
- : nativeMin(index, length - 1);
- }
- return baseFindIndex(array, getIteratee(predicate, 3), index, true);
- }
-
- /**
- * Flattens `array` a single level deep.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to flatten.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * _.flatten([1, [2, [3, [4]], 5]]);
- * // => [1, 2, [3, [4]], 5]
- */
- function flatten(array) {
- var length = array ? array.length : 0;
- return length ? baseFlatten(array, 1) : [];
- }
-
- /**
- * Recursively flattens `array`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to flatten.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * _.flattenDeep([1, [2, [3, [4]], 5]]);
- * // => [1, 2, 3, 4, 5]
- */
- function flattenDeep(array) {
- var length = array ? array.length : 0;
- return length ? baseFlatten(array, INFINITY) : [];
- }
-
- /**
- * Recursively flatten `array` up to `depth` times.
- *
- * @static
- * @memberOf _
- * @since 4.4.0
- * @category Array
- * @param {Array} array The array to flatten.
- * @param {number} [depth=1] The maximum recursion depth.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * var array = [1, [2, [3, [4]], 5]];
- *
- * _.flattenDepth(array, 1);
- * // => [1, 2, [3, [4]], 5]
- *
- * _.flattenDepth(array, 2);
- * // => [1, 2, 3, [4], 5]
- */
- function flattenDepth(array, depth) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- depth = depth === undefined ? 1 : toInteger(depth);
- return baseFlatten(array, depth);
- }
-
- /**
- * The inverse of `_.toPairs`; this method returns an object composed
- * from key-value `pairs`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} pairs The key-value pairs.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.fromPairs([['a', 1], ['b', 2]]);
- * // => { 'a': 1, 'b': 2 }
- */
- function fromPairs(pairs) {
- var index = -1,
- length = pairs ? pairs.length : 0,
- result = {};
-
- while (++index < length) {
- var pair = pairs[index];
- result[pair[0]] = pair[1];
- }
- return result;
- }
-
- /**
- * Gets the first element of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @alias first
- * @category Array
- * @param {Array} array The array to query.
- * @returns {*} Returns the first element of `array`.
- * @example
- *
- * _.head([1, 2, 3]);
- * // => 1
- *
- * _.head([]);
- * // => undefined
- */
- function head(array) {
- return (array && array.length) ? array[0] : undefined;
- }
-
- /**
- * Gets the index at which the first occurrence of `value` is found in `array`
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons. If `fromIndex` is negative, it's used as the
- * offset from the end of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.indexOf([1, 2, 1, 2], 2);
- * // => 1
- *
- * // Search from the `fromIndex`.
- * _.indexOf([1, 2, 1, 2], 2, 2);
- * // => 3
- */
- function indexOf(array, value, fromIndex) {
- var length = array ? array.length : 0;
- if (!length) {
- return -1;
- }
- var index = fromIndex == null ? 0 : toInteger(fromIndex);
- if (index < 0) {
- index = nativeMax(length + index, 0);
- }
- return baseIndexOf(array, value, index);
- }
-
- /**
- * Gets all but the last element of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to query.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.initial([1, 2, 3]);
- * // => [1, 2]
- */
- function initial(array) {
- var length = array ? array.length : 0;
- return length ? baseSlice(array, 0, -1) : [];
- }
-
- /**
- * Creates an array of unique values that are included in all given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons. The order of result values is determined by the
- * order they occur in the first array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * _.intersection([2, 1], [2, 3]);
- * // => [2]
- */
- var intersection = baseRest(function(arrays) {
- var mapped = arrayMap(arrays, castArrayLikeObject);
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped)
- : [];
- });
-
- /**
- * This method is like `_.intersection` except that it accepts `iteratee`
- * which is invoked for each element of each `arrays` to generate the criterion
- * by which they're compared. Result values are chosen from the first array.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
- * // => [2.1]
- *
- * // The `_.property` iteratee shorthand.
- * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }]
- */
- var intersectionBy = baseRest(function(arrays) {
- var iteratee = last(arrays),
- mapped = arrayMap(arrays, castArrayLikeObject);
-
- if (iteratee === last(mapped)) {
- iteratee = undefined;
- } else {
- mapped.pop();
- }
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped, getIteratee(iteratee, 2))
- : [];
- });
-
- /**
- * This method is like `_.intersection` except that it accepts `comparator`
- * which is invoked to compare elements of `arrays`. Result values are chosen
- * from the first array. The comparator is invoked with two arguments:
- * (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.intersectionWith(objects, others, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }]
- */
- var intersectionWith = baseRest(function(arrays) {
- var comparator = last(arrays),
- mapped = arrayMap(arrays, castArrayLikeObject);
-
- if (comparator === last(mapped)) {
- comparator = undefined;
- } else {
- mapped.pop();
- }
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped, undefined, comparator)
- : [];
- });
-
- /**
- * Converts all elements in `array` into a string separated by `separator`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to convert.
- * @param {string} [separator=','] The element separator.
- * @returns {string} Returns the joined string.
- * @example
- *
- * _.join(['a', 'b', 'c'], '~');
- * // => 'a~b~c'
- */
- function join(array, separator) {
- return array ? nativeJoin.call(array, separator) : '';
- }
-
- /**
- * Gets the last element of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to query.
- * @returns {*} Returns the last element of `array`.
- * @example
- *
- * _.last([1, 2, 3]);
- * // => 3
- */
- function last(array) {
- var length = array ? array.length : 0;
- return length ? array[length - 1] : undefined;
- }
-
- /**
- * This method is like `_.indexOf` except that it iterates over elements of
- * `array` from right to left.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=array.length-1] The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.lastIndexOf([1, 2, 1, 2], 2);
- * // => 3
- *
- * // Search from the `fromIndex`.
- * _.lastIndexOf([1, 2, 1, 2], 2, 2);
- * // => 1
- */
- function lastIndexOf(array, value, fromIndex) {
- var length = array ? array.length : 0;
- if (!length) {
- return -1;
- }
- var index = length;
- if (fromIndex !== undefined) {
- index = toInteger(fromIndex);
- index = (
- index < 0
- ? nativeMax(length + index, 0)
- : nativeMin(index, length - 1)
- ) + 1;
- }
- if (value !== value) {
- return baseFindIndex(array, baseIsNaN, index - 1, true);
- }
- while (index--) {
- if (array[index] === value) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * Gets the element at index `n` of `array`. If `n` is negative, the nth
- * element from the end is returned.
- *
- * @static
- * @memberOf _
- * @since 4.11.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=0] The index of the element to return.
- * @returns {*} Returns the nth element of `array`.
- * @example
- *
- * var array = ['a', 'b', 'c', 'd'];
- *
- * _.nth(array, 1);
- * // => 'b'
- *
- * _.nth(array, -2);
- * // => 'c';
- */
- function nth(array, n) {
- return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
- }
-
- /**
- * Removes all given values from `array` using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
- * to remove elements from an array by predicate.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {...*} [values] The values to remove.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
- *
- * _.pull(array, 'a', 'c');
- * console.log(array);
- * // => ['b', 'b']
- */
- var pull = baseRest(pullAll);
-
- /**
- * This method is like `_.pull` except that it accepts an array of values to remove.
- *
- * **Note:** Unlike `_.difference`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
- *
- * _.pullAll(array, ['a', 'c']);
- * console.log(array);
- * // => ['b', 'b']
- */
- function pullAll(array, values) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values)
- : array;
- }
-
- /**
- * This method is like `_.pullAll` except that it accepts `iteratee` which is
- * invoked for each element of `array` and `values` to generate the criterion
- * by which they're compared. The iteratee is invoked with one argument: (value).
- *
- * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [iteratee=_.identity]
- * The iteratee invoked per element.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
- *
- * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
- * console.log(array);
- * // => [{ 'x': 2 }]
- */
- function pullAllBy(array, values, iteratee) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values, getIteratee(iteratee, 2))
- : array;
- }
-
- /**
- * This method is like `_.pullAll` except that it accepts `comparator` which
- * is invoked to compare elements of `array` to `values`. The comparator is
- * invoked with two arguments: (arrVal, othVal).
- *
- * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 4.6.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
- *
- * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
- * console.log(array);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
- */
- function pullAllWith(array, values, comparator) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values, undefined, comparator)
- : array;
- }
-
- /**
- * Removes elements from `array` corresponding to `indexes` and returns an
- * array of removed elements.
- *
- * **Note:** Unlike `_.at`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {...(number|number[])} [indexes] The indexes of elements to remove.
- * @returns {Array} Returns the new array of removed elements.
- * @example
- *
- * var array = ['a', 'b', 'c', 'd'];
- * var pulled = _.pullAt(array, [1, 3]);
- *
- * console.log(array);
- * // => ['a', 'c']
- *
- * console.log(pulled);
- * // => ['b', 'd']
- */
- var pullAt = baseRest(function(array, indexes) {
- indexes = baseFlatten(indexes, 1);
-
- var length = array ? array.length : 0,
- result = baseAt(array, indexes);
-
- basePullAt(array, arrayMap(indexes, function(index) {
- return isIndex(index, length) ? +index : index;
- }).sort(compareAscending));
-
- return result;
- });
-
- /**
- * Removes all elements from `array` that `predicate` returns truthy for
- * and returns an array of the removed elements. The predicate is invoked
- * with three arguments: (value, index, array).
- *
- * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
- * to pull elements from an array by value.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the new array of removed elements.
- * @example
- *
- * var array = [1, 2, 3, 4];
- * var evens = _.remove(array, function(n) {
- * return n % 2 == 0;
- * });
- *
- * console.log(array);
- * // => [1, 3]
- *
- * console.log(evens);
- * // => [2, 4]
- */
- function remove(array, predicate) {
- var result = [];
- if (!(array && array.length)) {
- return result;
- }
- var index = -1,
- indexes = [],
- length = array.length;
-
- predicate = getIteratee(predicate, 3);
- while (++index < length) {
- var value = array[index];
- if (predicate(value, index, array)) {
- result.push(value);
- indexes.push(index);
- }
- }
- basePullAt(array, indexes);
- return result;
- }
-
- /**
- * Reverses `array` so that the first element becomes the last, the second
- * element becomes the second to last, and so on.
- *
- * **Note:** This method mutates `array` and is based on
- * [`Array#reverse`](https://mdn.io/Array/reverse).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _.reverse(array);
- * // => [3, 2, 1]
- *
- * console.log(array);
- * // => [3, 2, 1]
- */
- function reverse(array) {
- return array ? nativeReverse.call(array) : array;
- }
-
- /**
- * Creates a slice of `array` from `start` up to, but not including, `end`.
- *
- * **Note:** This method is used instead of
- * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
- * returned.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
- function slice(array, start, end) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
- start = 0;
- end = length;
- }
- else {
- start = start == null ? 0 : toInteger(start);
- end = end === undefined ? length : toInteger(end);
- }
- return baseSlice(array, start, end);
- }
-
- /**
- * Uses a binary search to determine the lowest index at which `value`
- * should be inserted into `array` in order to maintain its sort order.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * _.sortedIndex([30, 50], 40);
- * // => 1
- */
- function sortedIndex(array, value) {
- return baseSortedIndex(array, value);
- }
-
- /**
- * This method is like `_.sortedIndex` except that it accepts `iteratee`
- * which is invoked for `value` and each element of `array` to compute their
- * sort ranking. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} [iteratee=_.identity]
- * The iteratee invoked per element.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * var objects = [{ 'x': 4 }, { 'x': 5 }];
- *
- * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
- * // => 0
- *
- * // The `_.property` iteratee shorthand.
- * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
- * // => 0
- */
- function sortedIndexBy(array, value, iteratee) {
- return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
- }
-
- /**
- * This method is like `_.indexOf` except that it performs a binary
- * search on a sorted `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
- * // => 1
- */
- function sortedIndexOf(array, value) {
- var length = array ? array.length : 0;
- if (length) {
- var index = baseSortedIndex(array, value);
- if (index < length && eq(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * This method is like `_.sortedIndex` except that it returns the highest
- * index at which `value` should be inserted into `array` in order to
- * maintain its sort order.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
- * // => 4
- */
- function sortedLastIndex(array, value) {
- return baseSortedIndex(array, value, true);
- }
-
- /**
- * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
- * which is invoked for `value` and each element of `array` to compute their
- * sort ranking. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} [iteratee=_.identity]
- * The iteratee invoked per element.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * var objects = [{ 'x': 4 }, { 'x': 5 }];
- *
- * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
- * // => 1
- *
- * // The `_.property` iteratee shorthand.
- * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
- * // => 1
- */
- function sortedLastIndexBy(array, value, iteratee) {
- return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
- }
-
- /**
- * This method is like `_.lastIndexOf` except that it performs a binary
- * search on a sorted `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
- * // => 3
- */
- function sortedLastIndexOf(array, value) {
- var length = array ? array.length : 0;
- if (length) {
- var index = baseSortedIndex(array, value, true) - 1;
- if (eq(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * This method is like `_.uniq` except that it's designed and optimized
- * for sorted arrays.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.sortedUniq([1, 1, 2]);
- * // => [1, 2]
- */
- function sortedUniq(array) {
- return (array && array.length)
- ? baseSortedUniq(array)
- : [];
- }
-
- /**
- * This method is like `_.uniqBy` except that it's designed and optimized
- * for sorted arrays.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
- * // => [1.1, 2.3]
- */
- function sortedUniqBy(array, iteratee) {
- return (array && array.length)
- ? baseSortedUniq(array, getIteratee(iteratee, 2))
- : [];
- }
-
- /**
- * Gets all but the first element of `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.tail([1, 2, 3]);
- * // => [2, 3]
- */
- function tail(array) {
- var length = array ? array.length : 0;
- return length ? baseSlice(array, 1, length) : [];
- }
-
- /**
- * Creates a slice of `array` with `n` elements taken from the beginning.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to take.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.take([1, 2, 3]);
- * // => [1]
- *
- * _.take([1, 2, 3], 2);
- * // => [1, 2]
- *
- * _.take([1, 2, 3], 5);
- * // => [1, 2, 3]
- *
- * _.take([1, 2, 3], 0);
- * // => []
- */
- function take(array, n, guard) {
- if (!(array && array.length)) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- return baseSlice(array, 0, n < 0 ? 0 : n);
- }
-
- /**
- * Creates a slice of `array` with `n` elements taken from the end.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to take.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.takeRight([1, 2, 3]);
- * // => [3]
- *
- * _.takeRight([1, 2, 3], 2);
- * // => [2, 3]
- *
- * _.takeRight([1, 2, 3], 5);
- * // => [1, 2, 3]
- *
- * _.takeRight([1, 2, 3], 0);
- * // => []
- */
- function takeRight(array, n, guard) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- n = length - n;
- return baseSlice(array, n < 0 ? 0 : n, length);
- }
-
- /**
- * Creates a slice of `array` with elements taken from the end. Elements are
- * taken until `predicate` returns falsey. The predicate is invoked with
- * three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.takeRightWhile(users, function(o) { return !o.active; });
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.matches` iteratee shorthand.
- * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
- * // => objects for ['pebbles']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.takeRightWhile(users, ['active', false]);
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.property` iteratee shorthand.
- * _.takeRightWhile(users, 'active');
- * // => []
- */
- function takeRightWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), false, true)
- : [];
- }
-
- /**
- * Creates a slice of `array` with elements taken from the beginning. Elements
- * are taken until `predicate` returns falsey. The predicate is invoked with
- * three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false},
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.takeWhile(users, function(o) { return !o.active; });
- * // => objects for ['barney', 'fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.takeWhile(users, { 'user': 'barney', 'active': false });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.takeWhile(users, ['active', false]);
- * // => objects for ['barney', 'fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.takeWhile(users, 'active');
- * // => []
- */
- function takeWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3))
- : [];
- }
-
- /**
- * Creates an array of unique values, in order, from all given arrays using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * _.union([2], [1, 2]);
- * // => [2, 1]
- */
- var union = baseRest(function(arrays) {
- return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
- });
-
- /**
- * This method is like `_.union` except that it accepts `iteratee` which is
- * invoked for each element of each `arrays` to generate the criterion by
- * which uniqueness is computed. Result values are chosen from the first
- * array in which the value occurs. The iteratee is invoked with one argument:
- * (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [iteratee=_.identity]
- * The iteratee invoked per element.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * _.unionBy([2.1], [1.2, 2.3], Math.floor);
- * // => [2.1, 1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }, { 'x': 2 }]
- */
- var unionBy = baseRest(function(arrays) {
- var iteratee = last(arrays);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
- });
-
- /**
- * This method is like `_.union` except that it accepts `comparator` which
- * is invoked to compare elements of `arrays`. Result values are chosen from
- * the first array in which the value occurs. The comparator is invoked
- * with two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.unionWith(objects, others, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
- */
- var unionWith = baseRest(function(arrays) {
- var comparator = last(arrays);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
- });
-
- /**
- * Creates a duplicate-free version of an array, using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons, in which only the first occurrence of each
- * element is kept.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.uniq([2, 1, 2]);
- * // => [2, 1]
- */
- function uniq(array) {
- return (array && array.length)
- ? baseUniq(array)
- : [];
- }
-
- /**
- * This method is like `_.uniq` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * uniqueness is computed. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee=_.identity]
- * The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
- * // => [2.1, 1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }, { 'x': 2 }]
- */
- function uniqBy(array, iteratee) {
- return (array && array.length)
- ? baseUniq(array, getIteratee(iteratee, 2))
- : [];
- }
-
- /**
- * This method is like `_.uniq` except that it accepts `comparator` which
- * is invoked to compare elements of `array`. The comparator is invoked with
- * two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.uniqWith(objects, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
- */
- function uniqWith(array, comparator) {
- return (array && array.length)
- ? baseUniq(array, undefined, comparator)
- : [];
- }
-
- /**
- * This method is like `_.zip` except that it accepts an array of grouped
- * elements and creates an array regrouping the elements to their pre-zip
- * configuration.
- *
- * @static
- * @memberOf _
- * @since 1.2.0
- * @category Array
- * @param {Array} array The array of grouped elements to process.
- * @returns {Array} Returns the new array of regrouped elements.
- * @example
- *
- * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
- * // => [['a', 1, true], ['b', 2, false]]
- *
- * _.unzip(zipped);
- * // => [['a', 'b'], [1, 2], [true, false]]
- */
- function unzip(array) {
- if (!(array && array.length)) {
- return [];
- }
- var length = 0;
- array = arrayFilter(array, function(group) {
- if (isArrayLikeObject(group)) {
- length = nativeMax(group.length, length);
- return true;
- }
- });
- return baseTimes(length, function(index) {
- return arrayMap(array, baseProperty(index));
- });
- }
-
- /**
- * This method is like `_.unzip` except that it accepts `iteratee` to specify
- * how regrouped values should be combined. The iteratee is invoked with the
- * elements of each group: (...group).
- *
- * @static
- * @memberOf _
- * @since 3.8.0
- * @category Array
- * @param {Array} array The array of grouped elements to process.
- * @param {Function} [iteratee=_.identity] The function to combine
- * regrouped values.
- * @returns {Array} Returns the new array of regrouped elements.
- * @example
- *
- * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
- * // => [[1, 10, 100], [2, 20, 200]]
- *
- * _.unzipWith(zipped, _.add);
- * // => [3, 30, 300]
- */
- function unzipWith(array, iteratee) {
- if (!(array && array.length)) {
- return [];
- }
- var result = unzip(array);
- if (iteratee == null) {
- return result;
- }
- return arrayMap(result, function(group) {
- return apply(iteratee, undefined, group);
- });
- }
-
- /**
- * Creates an array excluding all given values using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * **Note:** Unlike `_.pull`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...*} [values] The values to exclude.
- * @returns {Array} Returns the new array of filtered values.
- * @see _.difference, _.xor
- * @example
- *
- * _.without([2, 1, 2, 3], 1, 2);
- * // => [3]
- */
- var without = baseRest(function(array, values) {
- return isArrayLikeObject(array)
- ? baseDifference(array, values)
- : [];
- });
-
- /**
- * Creates an array of unique values that is the
- * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
- * of the given arrays. The order of result values is determined by the order
- * they occur in the arrays.
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of filtered values.
- * @see _.difference, _.without
- * @example
- *
- * _.xor([2, 1], [2, 3]);
- * // => [1, 3]
- */
- var xor = baseRest(function(arrays) {
- return baseXor(arrayFilter(arrays, isArrayLikeObject));
- });
-
- /**
- * This method is like `_.xor` except that it accepts `iteratee` which is
- * invoked for each element of each `arrays` to generate the criterion by
- * which by which they're compared. The iteratee is invoked with one argument:
- * (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [iteratee=_.identity]
- * The iteratee invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
- * // => [1.2, 3.4]
- *
- * // The `_.property` iteratee shorthand.
- * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 2 }]
- */
- var xorBy = baseRest(function(arrays) {
- var iteratee = last(arrays);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
- });
-
- /**
- * This method is like `_.xor` except that it accepts `comparator` which is
- * invoked to compare elements of `arrays`. The comparator is invoked with
- * two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.xorWith(objects, others, _.isEqual);
- * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
- */
- var xorWith = baseRest(function(arrays) {
- var comparator = last(arrays);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
- });
-
- /**
- * Creates an array of grouped elements, the first of which contains the
- * first elements of the given arrays, the second of which contains the
- * second elements of the given arrays, and so on.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {...Array} [arrays] The arrays to process.
- * @returns {Array} Returns the new array of grouped elements.
- * @example
- *
- * _.zip(['a', 'b'], [1, 2], [true, false]);
- * // => [['a', 1, true], ['b', 2, false]]
- */
- var zip = baseRest(unzip);
-
- /**
- * This method is like `_.fromPairs` except that it accepts two arrays,
- * one of property identifiers and one of corresponding values.
- *
- * @static
- * @memberOf _
- * @since 0.4.0
- * @category Array
- * @param {Array} [props=[]] The property identifiers.
- * @param {Array} [values=[]] The property values.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.zipObject(['a', 'b'], [1, 2]);
- * // => { 'a': 1, 'b': 2 }
- */
- function zipObject(props, values) {
- return baseZipObject(props || [], values || [], assignValue);
- }
-
- /**
- * This method is like `_.zipObject` except that it supports property paths.
- *
- * @static
- * @memberOf _
- * @since 4.1.0
- * @category Array
- * @param {Array} [props=[]] The property identifiers.
- * @param {Array} [values=[]] The property values.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
- * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
- */
- function zipObjectDeep(props, values) {
- return baseZipObject(props || [], values || [], baseSet);
- }
-
- /**
- * This method is like `_.zip` except that it accepts `iteratee` to specify
- * how grouped values should be combined. The iteratee is invoked with the
- * elements of each group: (...group).
- *
- * @static
- * @memberOf _
- * @since 3.8.0
- * @category Array
- * @param {...Array} [arrays] The arrays to process.
- * @param {Function} [iteratee=_.identity] The function to combine grouped values.
- * @returns {Array} Returns the new array of grouped elements.
- * @example
- *
- * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
- * return a + b + c;
- * });
- * // => [111, 222]
- */
- var zipWith = baseRest(function(arrays) {
- var length = arrays.length,
- iteratee = length > 1 ? arrays[length - 1] : undefined;
-
- iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
- return unzipWith(arrays, iteratee);
- });
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a `lodash` wrapper instance that wraps `value` with explicit method
- * chain sequences enabled. The result of such sequences must be unwrapped
- * with `_#value`.
- *
- * @static
- * @memberOf _
- * @since 1.3.0
- * @category Seq
- * @param {*} value The value to wrap.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 },
- * { 'user': 'pebbles', 'age': 1 }
- * ];
- *
- * var youngest = _
- * .chain(users)
- * .sortBy('age')
- * .map(function(o) {
- * return o.user + ' is ' + o.age;
- * })
- * .head()
- * .value();
- * // => 'pebbles is 1'
- */
- function chain(value) {
- var result = lodash(value);
- result.__chain__ = true;
- return result;
- }
-
- /**
- * This method invokes `interceptor` and returns `value`. The interceptor
- * is invoked with one argument; (value). The purpose of this method is to
- * "tap into" a method chain sequence in order to modify intermediate results.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Seq
- * @param {*} value The value to provide to `interceptor`.
- * @param {Function} interceptor The function to invoke.
- * @returns {*} Returns `value`.
- * @example
- *
- * _([1, 2, 3])
- * .tap(function(array) {
- * // Mutate input array.
- * array.pop();
- * })
- * .reverse()
- * .value();
- * // => [2, 1]
- */
- function tap(value, interceptor) {
- interceptor(value);
- return value;
- }
-
- /**
- * This method is like `_.tap` except that it returns the result of `interceptor`.
- * The purpose of this method is to "pass thru" values replacing intermediate
- * results in a method chain sequence.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Seq
- * @param {*} value The value to provide to `interceptor`.
- * @param {Function} interceptor The function to invoke.
- * @returns {*} Returns the result of `interceptor`.
- * @example
- *
- * _(' abc ')
- * .chain()
- * .trim()
- * .thru(function(value) {
- * return [value];
- * })
- * .value();
- * // => ['abc']
- */
- function thru(value, interceptor) {
- return interceptor(value);
- }
-
- /**
- * This method is the wrapper version of `_.at`.
- *
- * @name at
- * @memberOf _
- * @since 1.0.0
- * @category Seq
- * @param {...(string|string[])} [paths] The property paths of elements to pick.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
- *
- * _(object).at(['a[0].b.c', 'a[1]']).value();
- * // => [3, 4]
- */
- var wrapperAt = baseRest(function(paths) {
- paths = baseFlatten(paths, 1);
- var length = paths.length,
- start = length ? paths[0] : 0,
- value = this.__wrapped__,
- interceptor = function(object) { return baseAt(object, paths); };
-
- if (length > 1 || this.__actions__.length ||
- !(value instanceof LazyWrapper) || !isIndex(start)) {
- return this.thru(interceptor);
- }
- value = value.slice(start, +start + (length ? 1 : 0));
- value.__actions__.push({
- 'func': thru,
- 'args': [interceptor],
- 'thisArg': undefined
- });
- return new LodashWrapper(value, this.__chain__).thru(function(array) {
- if (length && !array.length) {
- array.push(undefined);
- }
- return array;
- });
- });
-
- /**
- * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
- *
- * @name chain
- * @memberOf _
- * @since 0.1.0
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 }
- * ];
- *
- * // A sequence without explicit chaining.
- * _(users).head();
- * // => { 'user': 'barney', 'age': 36 }
- *
- * // A sequence with explicit chaining.
- * _(users)
- * .chain()
- * .head()
- * .pick('user')
- * .value();
- * // => { 'user': 'barney' }
- */
- function wrapperChain() {
- return chain(this);
- }
-
- /**
- * Executes the chain sequence and returns the wrapped result.
- *
- * @name commit
- * @memberOf _
- * @since 3.2.0
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var array = [1, 2];
- * var wrapped = _(array).push(3);
- *
- * console.log(array);
- * // => [1, 2]
- *
- * wrapped = wrapped.commit();
- * console.log(array);
- * // => [1, 2, 3]
- *
- * wrapped.last();
- * // => 3
- *
- * console.log(array);
- * // => [1, 2, 3]
- */
- function wrapperCommit() {
- return new LodashWrapper(this.value(), this.__chain__);
- }
-
- /**
- * Gets the next value on a wrapped object following the
- * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
- *
- * @name next
- * @memberOf _
- * @since 4.0.0
- * @category Seq
- * @returns {Object} Returns the next iterator value.
- * @example
- *
- * var wrapped = _([1, 2]);
- *
- * wrapped.next();
- * // => { 'done': false, 'value': 1 }
- *
- * wrapped.next();
- * // => { 'done': false, 'value': 2 }
- *
- * wrapped.next();
- * // => { 'done': true, 'value': undefined }
- */
- function wrapperNext() {
- if (this.__values__ === undefined) {
- this.__values__ = toArray(this.value());
- }
- var done = this.__index__ >= this.__values__.length,
- value = done ? undefined : this.__values__[this.__index__++];
-
- return { 'done': done, 'value': value };
- }
-
- /**
- * Enables the wrapper to be iterable.
- *
- * @name Symbol.iterator
- * @memberOf _
- * @since 4.0.0
- * @category Seq
- * @returns {Object} Returns the wrapper object.
- * @example
- *
- * var wrapped = _([1, 2]);
- *
- * wrapped[Symbol.iterator]() === wrapped;
- * // => true
- *
- * Array.from(wrapped);
- * // => [1, 2]
- */
- function wrapperToIterator() {
- return this;
- }
-
- /**
- * Creates a clone of the chain sequence planting `value` as the wrapped value.
- *
- * @name plant
- * @memberOf _
- * @since 3.2.0
- * @category Seq
- * @param {*} value The value to plant.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var wrapped = _([1, 2]).map(square);
- * var other = wrapped.plant([3, 4]);
- *
- * other.value();
- * // => [9, 16]
- *
- * wrapped.value();
- * // => [1, 4]
- */
- function wrapperPlant(value) {
- var result,
- parent = this;
-
- while (parent instanceof baseLodash) {
- var clone = wrapperClone(parent);
- clone.__index__ = 0;
- clone.__values__ = undefined;
- if (result) {
- previous.__wrapped__ = clone;
- } else {
- result = clone;
- }
- var previous = clone;
- parent = parent.__wrapped__;
- }
- previous.__wrapped__ = value;
- return result;
- }
-
- /**
- * This method is the wrapper version of `_.reverse`.
- *
- * **Note:** This method mutates the wrapped array.
- *
- * @name reverse
- * @memberOf _
- * @since 0.1.0
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _(array).reverse().value()
- * // => [3, 2, 1]
- *
- * console.log(array);
- * // => [3, 2, 1]
- */
- function wrapperReverse() {
- var value = this.__wrapped__;
- if (value instanceof LazyWrapper) {
- var wrapped = value;
- if (this.__actions__.length) {
- wrapped = new LazyWrapper(this);
- }
- wrapped = wrapped.reverse();
- wrapped.__actions__.push({
- 'func': thru,
- 'args': [reverse],
- 'thisArg': undefined
- });
- return new LodashWrapper(wrapped, this.__chain__);
- }
- return this.thru(reverse);
- }
-
- /**
- * Executes the chain sequence to resolve the unwrapped value.
- *
- * @name value
- * @memberOf _
- * @since 0.1.0
- * @alias toJSON, valueOf
- * @category Seq
- * @returns {*} Returns the resolved unwrapped value.
- * @example
- *
- * _([1, 2, 3]).value();
- * // => [1, 2, 3]
- */
- function wrapperValue() {
- return baseWrapperValue(this.__wrapped__, this.__actions__);
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` thru `iteratee`. The corresponding value of
- * each key is the number of times the key was returned by `iteratee`. The
- * iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 0.5.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity]
- * The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * _.countBy([6.1, 4.2, 6.3], Math.floor);
- * // => { '4': 1, '6': 2 }
- *
- * // The `_.property` iteratee shorthand.
- * _.countBy(['one', 'two', 'three'], 'length');
- * // => { '3': 2, '5': 1 }
- */
- var countBy = createAggregator(function(result, value, key) {
- hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
- });
-
- /**
- * Checks if `predicate` returns truthy for **all** elements of `collection`.
- * Iteration is stopped once `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index|key, collection).
- *
- * **Note:** This method returns `true` for
- * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
- * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
- * elements of empty collections.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {boolean} Returns `true` if all elements pass the predicate check,
- * else `false`.
- * @example
- *
- * _.every([true, 1, null, 'yes'], Boolean);
- * // => false
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.every(users, { 'user': 'barney', 'active': false });
- * // => false
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.every(users, ['active', false]);
- * // => true
- *
- * // The `_.property` iteratee shorthand.
- * _.every(users, 'active');
- * // => false
- */
- function every(collection, predicate, guard) {
- var func = isArray(collection) ? arrayEvery : baseEvery;
- if (guard && isIterateeCall(collection, predicate, guard)) {
- predicate = undefined;
- }
- return func(collection, getIteratee(predicate, 3));
- }
-
- /**
- * Iterates over elements of `collection`, returning an array of all elements
- * `predicate` returns truthy for. The predicate is invoked with three
- * arguments: (value, index|key, collection).
- *
- * **Note:** Unlike `_.remove`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- * @see _.reject
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
- *
- * _.filter(users, function(o) { return !o.active; });
- * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.filter(users, { 'age': 36, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.filter(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.filter(users, 'active');
- * // => objects for ['barney']
- */
- function filter(collection, predicate) {
- var func = isArray(collection) ? arrayFilter : baseFilter;
- return func(collection, getIteratee(predicate, 3));
- }
-
- /**
- * Iterates over elements of `collection`, returning the first element
- * `predicate` returns truthy for. The predicate is invoked with three
- * arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to inspect.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {*} Returns the matched element, else `undefined`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false },
- * { 'user': 'pebbles', 'age': 1, 'active': true }
- * ];
- *
- * _.find(users, function(o) { return o.age < 40; });
- * // => object for 'barney'
- *
- * // The `_.matches` iteratee shorthand.
- * _.find(users, { 'age': 1, 'active': true });
- * // => object for 'pebbles'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.find(users, ['active', false]);
- * // => object for 'fred'
- *
- * // The `_.property` iteratee shorthand.
- * _.find(users, 'active');
- * // => object for 'barney'
- */
- var find = createFind(findIndex);
-
- /**
- * This method is like `_.find` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to inspect.
- * @param {Function} [predicate=_.identity]
- * The function invoked per iteration.
- * @param {number} [fromIndex=collection.length-1] The index to search from.
- * @returns {*} Returns the matched element, else `undefined`.
- * @example
- *
- * _.findLast([1, 2, 3, 4], function(n) {
- * return n % 2 == 1;
- * });
- * // => 3
- */
- var findLast = createFind(findLastIndex);
-
- /**
- * Creates a flattened array of values by running each element in `collection`
- * thru `iteratee` and flattening the mapped results. The iteratee is invoked
- * with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [n, n];
- * }
- *
- * _.flatMap([1, 2], duplicate);
- * // => [1, 1, 2, 2]
- */
- function flatMap(collection, iteratee) {
- return baseFlatten(map(collection, iteratee), 1);
- }
-
- /**
- * This method is like `_.flatMap` except that it recursively flattens the
- * mapped results.
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity]
- * The function invoked per iteration.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [[[n, n]]];
- * }
- *
- * _.flatMapDeep([1, 2], duplicate);
- * // => [1, 1, 2, 2]
- */
- function flatMapDeep(collection, iteratee) {
- return baseFlatten(map(collection, iteratee), INFINITY);
- }
-
- /**
- * This method is like `_.flatMap` except that it recursively flattens the
- * mapped results up to `depth` times.
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity]
- * The function invoked per iteration.
- * @param {number} [depth=1] The maximum recursion depth.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [[[n, n]]];
- * }
- *
- * _.flatMapDepth([1, 2], duplicate, 2);
- * // => [[1, 1], [2, 2]]
- */
- function flatMapDepth(collection, iteratee, depth) {
- depth = depth === undefined ? 1 : toInteger(depth);
- return baseFlatten(map(collection, iteratee), depth);
- }
-
- /**
- * Iterates over elements of `collection` and invokes `iteratee` for each element.
- * The iteratee is invoked with three arguments: (value, index|key, collection).
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * **Note:** As with other "Collections" methods, objects with a "length"
- * property are iterated like arrays. To avoid this behavior use `_.forIn`
- * or `_.forOwn` for object iteration.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @alias each
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- * @see _.forEachRight
- * @example
- *
- * _([1, 2]).forEach(function(value) {
- * console.log(value);
- * });
- * // => Logs `1` then `2`.
- *
- * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
- * console.log(key);
- * });
- * // => Logs 'a' then 'b' (iteration order is not guaranteed).
- */
- function forEach(collection, iteratee) {
- var func = isArray(collection) ? arrayEach : baseEach;
- return func(collection, getIteratee(iteratee, 3));
- }
-
- /**
- * This method is like `_.forEach` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @alias eachRight
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- * @see _.forEach
- * @example
- *
- * _.forEachRight([1, 2], function(value) {
- * console.log(value);
- * });
- * // => Logs `2` then `1`.
- */
- function forEachRight(collection, iteratee) {
- var func = isArray(collection) ? arrayEachRight : baseEachRight;
- return func(collection, getIteratee(iteratee, 3));
- }
-
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` thru `iteratee`. The order of grouped values
- * is determined by the order they occur in `collection`. The corresponding
- * value of each key is an array of elements responsible for generating the
- * key. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity]
- * The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * _.groupBy([6.1, 4.2, 6.3], Math.floor);
- * // => { '4': [4.2], '6': [6.1, 6.3] }
- *
- * // The `_.property` iteratee shorthand.
- * _.groupBy(['one', 'two', 'three'], 'length');
- * // => { '3': ['one', 'two'], '5': ['three'] }
- */
- var groupBy = createAggregator(function(result, value, key) {
- if (hasOwnProperty.call(result, key)) {
- result[key].push(value);
- } else {
- result[key] = [value];
- }
- });
-
- /**
- * Checks if `value` is in `collection`. If `collection` is a string, it's
- * checked for a substring of `value`, otherwise
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * is used for equality comparisons. If `fromIndex` is negative, it's used as
- * the offset from the end of `collection`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object|string} collection The collection to inspect.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=0] The index to search from.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
- * @returns {boolean} Returns `true` if `value` is found, else `false`.
- * @example
- *
- * _.includes([1, 2, 3], 1);
- * // => true
- *
- * _.includes([1, 2, 3], 1, 2);
- * // => false
- *
- * _.includes({ 'a': 1, 'b': 2 }, 1);
- * // => true
- *
- * _.includes('abcd', 'bc');
- * // => true
- */
- function includes(collection, value, fromIndex, guard) {
- collection = isArrayLike(collection) ? collection : values(collection);
- fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
-
- var length = collection.length;
- if (fromIndex < 0) {
- fromIndex = nativeMax(length + fromIndex, 0);
- }
- return isString(collection)
- ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
- : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
- }
-
- /**
- * Invokes the method at `path` of each element in `collection`, returning
- * an array of the results of each invoked method. Any additional arguments
- * are provided to each invoked method. If `path` is a function, it's invoked
- * for, and `this` bound to, each element in `collection`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|string} path The path of the method to invoke or
- * the function invoked per iteration.
- * @param {...*} [args] The arguments to invoke each method with.
- * @returns {Array} Returns the array of results.
- * @example
- *
- * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
- * // => [[1, 5, 7], [1, 2, 3]]
- *
- * _.invokeMap([123, 456], String.prototype.split, '');
- * // => [['1', '2', '3'], ['4', '5', '6']]
- */
- var invokeMap = baseRest(function(collection, path, args) {
- var index = -1,
- isFunc = typeof path == 'function',
- isProp = isKey(path),
- result = isArrayLike(collection) ? Array(collection.length) : [];
-
- baseEach(collection, function(value) {
- var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
- result[++index] = func ? apply(func, value, args) : baseInvoke(value, path, args);
- });
- return result;
- });
-
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` thru `iteratee`. The corresponding value of
- * each key is the last element responsible for generating the key. The
- * iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity]
- * The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * var array = [
- * { 'dir': 'left', 'code': 97 },
- * { 'dir': 'right', 'code': 100 }
- * ];
- *
- * _.keyBy(array, function(o) {
- * return String.fromCharCode(o.code);
- * });
- * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
- *
- * _.keyBy(array, 'dir');
- * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
- */
- var keyBy = createAggregator(function(result, value, key) {
- result[key] = value;
- });
-
- /**
- * Creates an array of values by running each element in `collection` thru
- * `iteratee`. The iteratee is invoked with three arguments:
- * (value, index|key, collection).
- *
- * Many lodash methods are guarded to work as iteratees for methods like
- * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
- *
- * The guarded methods are:
- * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
- * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
- * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
- * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * _.map([4, 8], square);
- * // => [16, 64]
- *
- * _.map({ 'a': 4, 'b': 8 }, square);
- * // => [16, 64] (iteration order is not guaranteed)
- *
- * var users = [
- * { 'user': 'barney' },
- * { 'user': 'fred' }
- * ];
- *
- * // The `_.property` iteratee shorthand.
- * _.map(users, 'user');
- * // => ['barney', 'fred']
- */
- function map(collection, iteratee) {
- var func = isArray(collection) ? arrayMap : baseMap;
- return func(collection, getIteratee(iteratee, 3));
- }
-
- /**
- * This method is like `_.sortBy` except that it allows specifying the sort
- * orders of the iteratees to sort by. If `orders` is unspecified, all values
- * are sorted in ascending order. Otherwise, specify an order of "desc" for
- * descending or "asc" for ascending sort order of corresponding values.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
- * The iteratees to sort by.
- * @param {string[]} [orders] The sort orders of `iteratees`.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
- * @returns {Array} Returns the new sorted array.
- * @example
- *
- * var users = [
- * { 'user': 'fred', 'age': 48 },
- * { 'user': 'barney', 'age': 34 },
- * { 'user': 'fred', 'age': 40 },
- * { 'user': 'barney', 'age': 36 }
- * ];
- *
- * // Sort by `user` in ascending order and by `age` in descending order.
- * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
- */
- function orderBy(collection, iteratees, orders, guard) {
- if (collection == null) {
- return [];
- }
- if (!isArray(iteratees)) {
- iteratees = iteratees == null ? [] : [iteratees];
- }
- orders = guard ? undefined : orders;
- if (!isArray(orders)) {
- orders = orders == null ? [] : [orders];
- }
- return baseOrderBy(collection, iteratees, orders);
- }
-
- /**
- * Creates an array of elements split into two groups, the first of which
- * contains elements `predicate` returns truthy for, the second of which
- * contains elements `predicate` returns falsey for. The predicate is
- * invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the array of grouped elements.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': true },
- * { 'user': 'pebbles', 'age': 1, 'active': false }
- * ];
- *
- * _.partition(users, function(o) { return o.active; });
- * // => objects for [['fred'], ['barney', 'pebbles']]
- *
- * // The `_.matches` iteratee shorthand.
- * _.partition(users, { 'age': 1, 'active': false });
- * // => objects for [['pebbles'], ['barney', 'fred']]
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.partition(users, ['active', false]);
- * // => objects for [['barney', 'pebbles'], ['fred']]
- *
- * // The `_.property` iteratee shorthand.
- * _.partition(users, 'active');
- * // => objects for [['fred'], ['barney', 'pebbles']]
- */
- var partition = createAggregator(function(result, value, key) {
- result[key ? 0 : 1].push(value);
- }, function() { return [[], []]; });
-
- /**
- * Reduces `collection` to a value which is the accumulated result of running
- * each element in `collection` thru `iteratee`, where each successive
- * invocation is supplied the return value of the previous. If `accumulator`
- * is not given, the first element of `collection` is used as the initial
- * value. The iteratee is invoked with four arguments:
- * (accumulator, value, index|key, collection).
- *
- * Many lodash methods are guarded to work as iteratees for methods like
- * `_.reduce`, `_.reduceRight`, and `_.transform`.
- *
- * The guarded methods are:
- * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
- * and `sortBy`
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @returns {*} Returns the accumulated value.
- * @see _.reduceRight
- * @example
- *
- * _.reduce([1, 2], function(sum, n) {
- * return sum + n;
- * }, 0);
- * // => 3
- *
- * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
- * (result[value] || (result[value] = [])).push(key);
- * return result;
- * }, {});
- * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
- */
- function reduce(collection, iteratee, accumulator) {
- var func = isArray(collection) ? arrayReduce : baseReduce,
- initAccum = arguments.length < 3;
-
- return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
- }
-
- /**
- * This method is like `_.reduce` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @returns {*} Returns the accumulated value.
- * @see _.reduce
- * @example
- *
- * var array = [[0, 1], [2, 3], [4, 5]];
- *
- * _.reduceRight(array, function(flattened, other) {
- * return flattened.concat(other);
- * }, []);
- * // => [4, 5, 2, 3, 0, 1]
- */
- function reduceRight(collection, iteratee, accumulator) {
- var func = isArray(collection) ? arrayReduceRight : baseReduce,
- initAccum = arguments.length < 3;
-
- return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
- }
-
- /**
- * The opposite of `_.filter`; this method returns the elements of `collection`
- * that `predicate` does **not** return truthy for.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- * @see _.filter
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': true }
- * ];
- *
- * _.reject(users, function(o) { return !o.active; });
- * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.reject(users, { 'age': 40, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.reject(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.reject(users, 'active');
- * // => objects for ['barney']
- */
- function reject(collection, predicate) {
- var func = isArray(collection) ? arrayFilter : baseFilter;
- return func(collection, negate(getIteratee(predicate, 3)));
- }
-
- /**
- * Gets a random element from `collection`.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to sample.
- * @returns {*} Returns the random element.
- * @example
- *
- * _.sample([1, 2, 3, 4]);
- * // => 2
- */
- function sample(collection) {
- var array = isArrayLike(collection) ? collection : values(collection),
- length = array.length;
-
- return length > 0 ? array[baseRandom(0, length - 1)] : undefined;
- }
-
- /**
- * Gets `n` random elements at unique keys from `collection` up to the
- * size of `collection`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to sample.
- * @param {number} [n=1] The number of elements to sample.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the random elements.
- * @example
- *
- * _.sampleSize([1, 2, 3], 2);
- * // => [3, 1]
- *
- * _.sampleSize([1, 2, 3], 4);
- * // => [2, 3, 1]
- */
- function sampleSize(collection, n, guard) {
- var index = -1,
- result = toArray(collection),
- length = result.length,
- lastIndex = length - 1;
-
- if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
- n = 1;
- } else {
- n = baseClamp(toInteger(n), 0, length);
- }
- while (++index < n) {
- var rand = baseRandom(index, lastIndex),
- value = result[rand];
-
- result[rand] = result[index];
- result[index] = value;
- }
- result.length = n;
- return result;
- }
-
- /**
- * Creates an array of shuffled values, using a version of the
- * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to shuffle.
- * @returns {Array} Returns the new shuffled array.
- * @example
- *
- * _.shuffle([1, 2, 3, 4]);
- * // => [4, 1, 3, 2]
- */
- function shuffle(collection) {
- return sampleSize(collection, MAX_ARRAY_LENGTH);
- }
-
- /**
- * Gets the size of `collection` by returning its length for array-like
- * values or the number of own enumerable string keyed properties for objects.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object|string} collection The collection to inspect.
- * @returns {number} Returns the collection size.
- * @example
- *
- * _.size([1, 2, 3]);
- * // => 3
- *
- * _.size({ 'a': 1, 'b': 2 });
- * // => 2
- *
- * _.size('pebbles');
- * // => 7
- */
- function size(collection) {
- if (collection == null) {
- return 0;
- }
- if (isArrayLike(collection)) {
- return isString(collection) ? stringSize(collection) : collection.length;
- }
- var tag = getTag(collection);
- if (tag == mapTag || tag == setTag) {
- return collection.size;
- }
- return baseKeys(collection).length;
- }
-
- /**
- * Checks if `predicate` returns truthy for **any** element of `collection`.
- * Iteration is stopped once `predicate` returns truthy. The predicate is
- * invoked with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {boolean} Returns `true` if any element passes the predicate check,
- * else `false`.
- * @example
- *
- * _.some([null, 0, 'yes', false], Boolean);
- * // => true
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.some(users, { 'user': 'barney', 'active': false });
- * // => false
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.some(users, ['active', false]);
- * // => true
- *
- * // The `_.property` iteratee shorthand.
- * _.some(users, 'active');
- * // => true
- */
- function some(collection, predicate, guard) {
- var func = isArray(collection) ? arraySome : baseSome;
- if (guard && isIterateeCall(collection, predicate, guard)) {
- predicate = undefined;
- }
- return func(collection, getIteratee(predicate, 3));
- }
-
- /**
- * Creates an array of elements, sorted in ascending order by the results of
- * running each element in a collection thru each iteratee. This method
- * performs a stable sort, that is, it preserves the original sort order of
- * equal elements. The iteratees are invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {...(Function|Function[])} [iteratees=[_.identity]]
- * The iteratees to sort by.
- * @returns {Array} Returns the new sorted array.
- * @example
- *
- * var users = [
- * { 'user': 'fred', 'age': 48 },
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 },
- * { 'user': 'barney', 'age': 34 }
- * ];
- *
- * _.sortBy(users, function(o) { return o.user; });
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
- *
- * _.sortBy(users, ['user', 'age']);
- * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
- *
- * _.sortBy(users, 'user', function(o) {
- * return Math.floor(o.age / 10);
- * });
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
- */
- var sortBy = baseRest(function(collection, iteratees) {
- if (collection == null) {
- return [];
- }
- var length = iteratees.length;
- if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
- iteratees = [];
- } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
- iteratees = [iteratees[0]];
- }
- return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
- });
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Gets the timestamp of the number of milliseconds that have elapsed since
- * the Unix epoch (1 January 1970 00:00:00 UTC).
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Date
- * @returns {number} Returns the timestamp.
- * @example
- *
- * _.defer(function(stamp) {
- * console.log(_.now() - stamp);
- * }, _.now());
- * // => Logs the number of milliseconds it took for the deferred invocation.
- */
- var now = ctxNow || function() {
- return root.Date.now();
- };
-
- /*------------------------------------------------------------------------*/
-
- /**
- * The opposite of `_.before`; this method creates a function that invokes
- * `func` once it's called `n` or more times.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {number} n The number of calls before `func` is invoked.
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * var saves = ['profile', 'settings'];
- *
- * var done = _.after(saves.length, function() {
- * console.log('done saving!');
- * });
- *
- * _.forEach(saves, function(type) {
- * asyncSave({ 'type': type, 'complete': done });
- * });
- * // => Logs 'done saving!' after the two async saves have completed.
- */
- function after(n, func) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- n = toInteger(n);
- return function() {
- if (--n < 1) {
- return func.apply(this, arguments);
- }
- };
- }
-
- /**
- * Creates a function that invokes `func`, with up to `n` arguments,
- * ignoring any additional arguments.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} func The function to cap arguments for.
- * @param {number} [n=func.length] The arity cap.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the new capped function.
- * @example
- *
- * _.map(['6', '8', '10'], _.ary(parseInt, 1));
- * // => [6, 8, 10]
- */
- function ary(func, n, guard) {
- n = guard ? undefined : n;
- n = (func && n == null) ? func.length : n;
- return createWrap(func, ARY_FLAG, undefined, undefined, undefined, undefined, n);
- }
-
- /**
- * Creates a function that invokes `func`, with the `this` binding and arguments
- * of the created function, while it's called less than `n` times. Subsequent
- * calls to the created function return the result of the last `func` invocation.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {number} n The number of calls at which `func` is no longer invoked.
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * jQuery(element).on('click', _.before(5, addContactToList));
- * // => Allows adding up to 4 contacts to the list.
- */
- function before(n, func) {
- var result;
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- n = toInteger(n);
- return function() {
- if (--n > 0) {
- result = func.apply(this, arguments);
- }
- if (n <= 1) {
- func = undefined;
- }
- return result;
- };
- }
-
- /**
- * Creates a function that invokes `func` with the `this` binding of `thisArg`
- * and `partials` prepended to the arguments it receives.
- *
- * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
- * may be used as a placeholder for partially applied arguments.
- *
- * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
- * property of bound functions.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to bind.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new bound function.
- * @example
- *
- * function greet(greeting, punctuation) {
- * return greeting + ' ' + this.user + punctuation;
- * }
- *
- * var object = { 'user': 'fred' };
- *
- * var bound = _.bind(greet, object, 'hi');
- * bound('!');
- * // => 'hi fred!'
- *
- * // Bound with placeholders.
- * var bound = _.bind(greet, object, _, '!');
- * bound('hi');
- * // => 'hi fred!'
- */
- var bind = baseRest(function(func, thisArg, partials) {
- var bitmask = BIND_FLAG;
- if (partials.length) {
- var holders = replaceHolders(partials, getHolder(bind));
- bitmask |= PARTIAL_FLAG;
- }
- return createWrap(func, bitmask, thisArg, partials, holders);
- });
-
- /**
- * Creates a function that invokes the method at `object[key]` with `partials`
- * prepended to the arguments it receives.
- *
- * This method differs from `_.bind` by allowing bound functions to reference
- * methods that may be redefined or don't yet exist. See
- * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
- * for more details.
- *
- * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * @static
- * @memberOf _
- * @since 0.10.0
- * @category Function
- * @param {Object} object The object to invoke the method on.
- * @param {string} key The key of the method.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new bound function.
- * @example
- *
- * var object = {
- * 'user': 'fred',
- * 'greet': function(greeting, punctuation) {
- * return greeting + ' ' + this.user + punctuation;
- * }
- * };
- *
- * var bound = _.bindKey(object, 'greet', 'hi');
- * bound('!');
- * // => 'hi fred!'
- *
- * object.greet = function(greeting, punctuation) {
- * return greeting + 'ya ' + this.user + punctuation;
- * };
- *
- * bound('!');
- * // => 'hiya fred!'
- *
- * // Bound with placeholders.
- * var bound = _.bindKey(object, 'greet', _, '!');
- * bound('hi');
- * // => 'hiya fred!'
- */
- var bindKey = baseRest(function(object, key, partials) {
- var bitmask = BIND_FLAG | BIND_KEY_FLAG;
- if (partials.length) {
- var holders = replaceHolders(partials, getHolder(bindKey));
- bitmask |= PARTIAL_FLAG;
- }
- return createWrap(key, bitmask, object, partials, holders);
- });
-
- /**
- * Creates a function that accepts arguments of `func` and either invokes
- * `func` returning its result, if at least `arity` number of arguments have
- * been provided, or returns a function that accepts the remaining `func`
- * arguments, and so on. The arity of `func` may be specified if `func.length`
- * is not sufficient.
- *
- * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
- * may be used as a placeholder for provided arguments.
- *
- * **Note:** This method doesn't set the "length" property of curried functions.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Function
- * @param {Function} func The function to curry.
- * @param {number} [arity=func.length] The arity of `func`.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the new curried function.
- * @example
- *
- * var abc = function(a, b, c) {
- * return [a, b, c];
- * };
- *
- * var curried = _.curry(abc);
- *
- * curried(1)(2)(3);
- * // => [1, 2, 3]
- *
- * curried(1, 2)(3);
- * // => [1, 2, 3]
- *
- * curried(1, 2, 3);
- * // => [1, 2, 3]
- *
- * // Curried with placeholders.
- * curried(1)(_, 3)(2);
- * // => [1, 2, 3]
- */
- function curry(func, arity, guard) {
- arity = guard ? undefined : arity;
- var result = createWrap(func, CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
- result.placeholder = curry.placeholder;
- return result;
- }
-
- /**
- * This method is like `_.curry` except that arguments are applied to `func`
- * in the manner of `_.partialRight` instead of `_.partial`.
- *
- * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for provided arguments.
- *
- * **Note:** This method doesn't set the "length" property of curried functions.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} func The function to curry.
- * @param {number} [arity=func.length] The arity of `func`.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the new curried function.
- * @example
- *
- * var abc = function(a, b, c) {
- * return [a, b, c];
- * };
- *
- * var curried = _.curryRight(abc);
- *
- * curried(3)(2)(1);
- * // => [1, 2, 3]
- *
- * curried(2, 3)(1);
- * // => [1, 2, 3]
- *
- * curried(1, 2, 3);
- * // => [1, 2, 3]
- *
- * // Curried with placeholders.
- * curried(3)(1, _)(2);
- * // => [1, 2, 3]
- */
- function curryRight(func, arity, guard) {
- arity = guard ? undefined : arity;
- var result = createWrap(func, CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
- result.placeholder = curryRight.placeholder;
- return result;
- }
-
- /**
- * Creates a debounced function that delays invoking `func` until after `wait`
- * milliseconds have elapsed since the last time the debounced function was
- * invoked. The debounced function comes with a `cancel` method to cancel
- * delayed `func` invocations and a `flush` method to immediately invoke them.
- * Provide `options` to indicate whether `func` should be invoked on the
- * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
- * with the last arguments provided to the debounced function. Subsequent
- * calls to the debounced function return the result of the last `func`
- * invocation.
- *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is
- * invoked on the trailing edge of the timeout only if the debounced function
- * is invoked more than once during the `wait` timeout.
- *
- * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
- * until to the next tick, similar to `setTimeout` with a timeout of `0`.
- *
- * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
- * for details over the differences between `_.debounce` and `_.throttle`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to debounce.
- * @param {number} [wait=0] The number of milliseconds to delay.
- * @param {Object} [options={}] The options object.
- * @param {boolean} [options.leading=false]
- * Specify invoking on the leading edge of the timeout.
- * @param {number} [options.maxWait]
- * The maximum time `func` is allowed to be delayed before it's invoked.
- * @param {boolean} [options.trailing=true]
- * Specify invoking on the trailing edge of the timeout.
- * @returns {Function} Returns the new debounced function.
- * @example
- *
- * // Avoid costly calculations while the window size is in flux.
- * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
- *
- * // Invoke `sendMail` when clicked, debouncing subsequent calls.
- * jQuery(element).on('click', _.debounce(sendMail, 300, {
- * 'leading': true,
- * 'trailing': false
- * }));
- *
- * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
- * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
- * var source = new EventSource('/stream');
- * jQuery(source).on('message', debounced);
- *
- * // Cancel the trailing debounced invocation.
- * jQuery(window).on('popstate', debounced.cancel);
- */
- function debounce(func, wait, options) {
- var lastArgs,
- lastThis,
- maxWait,
- result,
- timerId,
- lastCallTime,
- lastInvokeTime = 0,
- leading = false,
- maxing = false,
- trailing = true;
-
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- wait = toNumber(wait) || 0;
- if (isObject(options)) {
- leading = !!options.leading;
- maxing = 'maxWait' in options;
- maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
- trailing = 'trailing' in options ? !!options.trailing : trailing;
- }
-
- function invokeFunc(time) {
- var args = lastArgs,
- thisArg = lastThis;
-
- lastArgs = lastThis = undefined;
- lastInvokeTime = time;
- result = func.apply(thisArg, args);
- return result;
- }
-
- function leadingEdge(time) {
- // Reset any `maxWait` timer.
- lastInvokeTime = time;
- // Start the timer for the trailing edge.
- timerId = setTimeout(timerExpired, wait);
- // Invoke the leading edge.
- return leading ? invokeFunc(time) : result;
- }
-
- function remainingWait(time) {
- var timeSinceLastCall = time - lastCallTime,
- timeSinceLastInvoke = time - lastInvokeTime,
- result = wait - timeSinceLastCall;
-
- return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;
- }
-
- function shouldInvoke(time) {
- var timeSinceLastCall = time - lastCallTime,
- timeSinceLastInvoke = time - lastInvokeTime;
-
- // Either this is the first call, activity has stopped and we're at the
- // trailing edge, the system time has gone backwards and we're treating
- // it as the trailing edge, or we've hit the `maxWait` limit.
- return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
- (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
- }
-
- function timerExpired() {
- var time = now();
- if (shouldInvoke(time)) {
- return trailingEdge(time);
- }
- // Restart the timer.
- timerId = setTimeout(timerExpired, remainingWait(time));
- }
-
- function trailingEdge(time) {
- timerId = undefined;
-
- // Only invoke if we have `lastArgs` which means `func` has been
- // debounced at least once.
- if (trailing && lastArgs) {
- return invokeFunc(time);
- }
- lastArgs = lastThis = undefined;
- return result;
- }
-
- function cancel() {
- if (timerId !== undefined) {
- clearTimeout(timerId);
- }
- lastInvokeTime = 0;
- lastArgs = lastCallTime = lastThis = timerId = undefined;
- }
-
- function flush() {
- return timerId === undefined ? result : trailingEdge(now());
- }
-
- function debounced() {
- var time = now(),
- isInvoking = shouldInvoke(time);
-
- lastArgs = arguments;
- lastThis = this;
- lastCallTime = time;
-
- if (isInvoking) {
- if (timerId === undefined) {
- return leadingEdge(lastCallTime);
- }
- if (maxing) {
- // Handle invocations in a tight loop.
- timerId = setTimeout(timerExpired, wait);
- return invokeFunc(lastCallTime);
- }
- }
- if (timerId === undefined) {
- timerId = setTimeout(timerExpired, wait);
- }
- return result;
- }
- debounced.cancel = cancel;
- debounced.flush = flush;
- return debounced;
- }
-
- /**
- * Defers invoking the `func` until the current call stack has cleared. Any
- * additional arguments are provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to defer.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {number} Returns the timer id.
- * @example
- *
- * _.defer(function(text) {
- * console.log(text);
- * }, 'deferred');
- * // => Logs 'deferred' after one or more milliseconds.
- */
- var defer = baseRest(function(func, args) {
- return baseDelay(func, 1, args);
- });
-
- /**
- * Invokes `func` after `wait` milliseconds. Any additional arguments are
- * provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {number} Returns the timer id.
- * @example
- *
- * _.delay(function(text) {
- * console.log(text);
- * }, 1000, 'later');
- * // => Logs 'later' after one second.
- */
- var delay = baseRest(function(func, wait, args) {
- return baseDelay(func, toNumber(wait) || 0, args);
- });
-
- /**
- * Creates a function that invokes `func` with arguments reversed.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Function
- * @param {Function} func The function to flip arguments for.
- * @returns {Function} Returns the new flipped function.
- * @example
- *
- * var flipped = _.flip(function() {
- * return _.toArray(arguments);
- * });
- *
- * flipped('a', 'b', 'c', 'd');
- * // => ['d', 'c', 'b', 'a']
- */
- function flip(func) {
- return createWrap(func, FLIP_FLAG);
- }
-
- /**
- * Creates a function that memoizes the result of `func`. If `resolver` is
- * provided, it determines the cache key for storing the result based on the
- * arguments provided to the memoized function. By default, the first argument
- * provided to the memoized function is used as the map cache key. The `func`
- * is invoked with the `this` binding of the memoized function.
- *
- * **Note:** The cache is exposed as the `cache` property on the memoized
- * function. Its creation may be customized by replacing the `_.memoize.Cache`
- * constructor with one whose instances implement the
- * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
- * method interface of `delete`, `get`, `has`, and `set`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to have its output memoized.
- * @param {Function} [resolver] The function to resolve the cache key.
- * @returns {Function} Returns the new memoized function.
- * @example
- *
- * var object = { 'a': 1, 'b': 2 };
- * var other = { 'c': 3, 'd': 4 };
- *
- * var values = _.memoize(_.values);
- * values(object);
- * // => [1, 2]
- *
- * values(other);
- * // => [3, 4]
- *
- * object.a = 2;
- * values(object);
- * // => [1, 2]
- *
- * // Modify the result cache.
- * values.cache.set(object, ['a', 'b']);
- * values(object);
- * // => ['a', 'b']
- *
- * // Replace `_.memoize.Cache`.
- * _.memoize.Cache = WeakMap;
- */
- function memoize(func, resolver) {
- if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- var memoized = function() {
- var args = arguments,
- key = resolver ? resolver.apply(this, args) : args[0],
- cache = memoized.cache;
-
- if (cache.has(key)) {
- return cache.get(key);
- }
- var result = func.apply(this, args);
- memoized.cache = cache.set(key, result);
- return result;
- };
- memoized.cache = new (memoize.Cache || MapCache);
- return memoized;
- }
-
- // Assign cache to `_.memoize`.
- memoize.Cache = MapCache;
-
- /**
- * Creates a function that negates the result of the predicate `func`. The
- * `func` predicate is invoked with the `this` binding and arguments of the
- * created function.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} predicate The predicate to negate.
- * @returns {Function} Returns the new negated function.
- * @example
- *
- * function isEven(n) {
- * return n % 2 == 0;
- * }
- *
- * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
- * // => [1, 3, 5]
- */
- function negate(predicate) {
- if (typeof predicate != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return function() {
- var args = arguments;
- switch (args.length) {
- case 0: return !predicate.call(this);
- case 1: return !predicate.call(this, args[0]);
- case 2: return !predicate.call(this, args[0], args[1]);
- case 3: return !predicate.call(this, args[0], args[1], args[2]);
- }
- return !predicate.apply(this, args);
- };
- }
-
- /**
- * Creates a function that is restricted to invoking `func` once. Repeat calls
- * to the function return the value of the first invocation. The `func` is
- * invoked with the `this` binding and arguments of the created function.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * var initialize = _.once(createApplication);
- * initialize();
- * initialize();
- * // => `createApplication` is invoked once
- */
- function once(func) {
- return before(2, func);
- }
-
- /**
- * Creates a function that invokes `func` with its arguments transformed.
- *
- * @static
- * @since 4.0.0
- * @memberOf _
- * @category Function
- * @param {Function} func The function to wrap.
- * @param {...(Function|Function[])} [transforms=[_.identity]]
- * The argument transforms.
- * @returns {Function} Returns the new function.
- * @example
- *
- * function doubled(n) {
- * return n * 2;
- * }
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var func = _.overArgs(function(x, y) {
- * return [x, y];
- * }, [square, doubled]);
- *
- * func(9, 3);
- * // => [81, 6]
- *
- * func(10, 5);
- * // => [100, 10]
- */
- var overArgs = baseRest(function(func, transforms) {
- transforms = (transforms.length == 1 && isArray(transforms[0]))
- ? arrayMap(transforms[0], baseUnary(getIteratee()))
- : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
-
- var funcsLength = transforms.length;
- return baseRest(function(args) {
- var index = -1,
- length = nativeMin(args.length, funcsLength);
-
- while (++index < length) {
- args[index] = transforms[index].call(this, args[index]);
- }
- return apply(func, this, args);
- });
- });
-
- /**
- * Creates a function that invokes `func` with `partials` prepended to the
- * arguments it receives. This method is like `_.bind` except it does **not**
- * alter the `this` binding.
- *
- * The `_.partial.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * **Note:** This method doesn't set the "length" property of partially
- * applied functions.
- *
- * @static
- * @memberOf _
- * @since 0.2.0
- * @category Function
- * @param {Function} func The function to partially apply arguments to.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new partially applied function.
- * @example
- *
- * function greet(greeting, name) {
- * return greeting + ' ' + name;
- * }
- *
- * var sayHelloTo = _.partial(greet, 'hello');
- * sayHelloTo('fred');
- * // => 'hello fred'
- *
- * // Partially applied with placeholders.
- * var greetFred = _.partial(greet, _, 'fred');
- * greetFred('hi');
- * // => 'hi fred'
- */
- var partial = baseRest(function(func, partials) {
- var holders = replaceHolders(partials, getHolder(partial));
- return createWrap(func, PARTIAL_FLAG, undefined, partials, holders);
- });
-
- /**
- * This method is like `_.partial` except that partially applied arguments
- * are appended to the arguments it receives.
- *
- * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * **Note:** This method doesn't set the "length" property of partially
- * applied functions.
- *
- * @static
- * @memberOf _
- * @since 1.0.0
- * @category Function
- * @param {Function} func The function to partially apply arguments to.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new partially applied function.
- * @example
- *
- * function greet(greeting, name) {
- * return greeting + ' ' + name;
- * }
- *
- * var greetFred = _.partialRight(greet, 'fred');
- * greetFred('hi');
- * // => 'hi fred'
- *
- * // Partially applied with placeholders.
- * var sayHelloTo = _.partialRight(greet, 'hello', _);
- * sayHelloTo('fred');
- * // => 'hello fred'
- */
- var partialRight = baseRest(function(func, partials) {
- var holders = replaceHolders(partials, getHolder(partialRight));
- return createWrap(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
- });
-
- /**
- * Creates a function that invokes `func` with arguments arranged according
- * to the specified `indexes` where the argument value at the first index is
- * provided as the first argument, the argument value at the second index is
- * provided as the second argument, and so on.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} func The function to rearrange arguments for.
- * @param {...(number|number[])} indexes The arranged argument indexes.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var rearged = _.rearg(function(a, b, c) {
- * return [a, b, c];
- * }, [2, 0, 1]);
- *
- * rearged('b', 'c', 'a')
- * // => ['a', 'b', 'c']
- */
- var rearg = baseRest(function(func, indexes) {
- return createWrap(func, REARG_FLAG, undefined, undefined, undefined, baseFlatten(indexes, 1));
- });
-
- /**
- * Creates a function that invokes `func` with the `this` binding of the
- * created function and arguments from `start` and beyond provided as
- * an array.
- *
- * **Note:** This method is based on the
- * [rest parameter](https://mdn.io/rest_parameters).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Function
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var say = _.rest(function(what, names) {
- * return what + ' ' + _.initial(names).join(', ') +
- * (_.size(names) > 1 ? ', & ' : '') + _.last(names);
- * });
- *
- * say('hello', 'fred', 'barney', 'pebbles');
- * // => 'hello fred, barney, & pebbles'
- */
- function rest(func, start) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- start = start === undefined ? start : toInteger(start);
- return baseRest(func, start);
- }
-
- /**
- * Creates a function that invokes `func` with the `this` binding of the
- * create function and an array of arguments much like
- * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
- *
- * **Note:** This method is based on the
- * [spread operator](https://mdn.io/spread_operator).
- *
- * @static
- * @memberOf _
- * @since 3.2.0
- * @category Function
- * @param {Function} func The function to spread arguments over.
- * @param {number} [start=0] The start position of the spread.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var say = _.spread(function(who, what) {
- * return who + ' says ' + what;
- * });
- *
- * say(['fred', 'hello']);
- * // => 'fred says hello'
- *
- * var numbers = Promise.all([
- * Promise.resolve(40),
- * Promise.resolve(36)
- * ]);
- *
- * numbers.then(_.spread(function(x, y) {
- * return x + y;
- * }));
- * // => a Promise of 76
- */
- function spread(func, start) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- start = start === undefined ? 0 : nativeMax(toInteger(start), 0);
- return baseRest(function(args) {
- var array = args[start],
- otherArgs = castSlice(args, 0, start);
-
- if (array) {
- arrayPush(otherArgs, array);
- }
- return apply(func, this, otherArgs);
- });
- }
-
- /**
- * Creates a throttled function that only invokes `func` at most once per
- * every `wait` milliseconds. The throttled function comes with a `cancel`
- * method to cancel delayed `func` invocations and a `flush` method to
- * immediately invoke them. Provide `options` to indicate whether `func`
- * should be invoked on the leading and/or trailing edge of the `wait`
- * timeout. The `func` is invoked with the last arguments provided to the
- * throttled function. Subsequent calls to the throttled function return the
- * result of the last `func` invocation.
- *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is
- * invoked on the trailing edge of the timeout only if the throttled function
- * is invoked more than once during the `wait` timeout.
- *
- * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
- * until to the next tick, similar to `setTimeout` with a timeout of `0`.
- *
- * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
- * for details over the differences between `_.throttle` and `_.debounce`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to throttle.
- * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
- * @param {Object} [options={}] The options object.
- * @param {boolean} [options.leading=true]
- * Specify invoking on the leading edge of the timeout.
- * @param {boolean} [options.trailing=true]
- * Specify invoking on the trailing edge of the timeout.
- * @returns {Function} Returns the new throttled function.
- * @example
- *
- * // Avoid excessively updating the position while scrolling.
- * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
- *
- * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
- * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
- * jQuery(element).on('click', throttled);
- *
- * // Cancel the trailing throttled invocation.
- * jQuery(window).on('popstate', throttled.cancel);
- */
- function throttle(func, wait, options) {
- var leading = true,
- trailing = true;
-
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- if (isObject(options)) {
- leading = 'leading' in options ? !!options.leading : leading;
- trailing = 'trailing' in options ? !!options.trailing : trailing;
- }
- return debounce(func, wait, {
- 'leading': leading,
- 'maxWait': wait,
- 'trailing': trailing
- });
- }
-
- /**
- * Creates a function that accepts up to one argument, ignoring any
- * additional arguments.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Function
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new capped function.
- * @example
- *
- * _.map(['6', '8', '10'], _.unary(parseInt));
- * // => [6, 8, 10]
- */
- function unary(func) {
- return ary(func, 1);
- }
-
- /**
- * Creates a function that provides `value` to `wrapper` as its first
- * argument. Any additional arguments provided to the function are appended
- * to those provided to the `wrapper`. The wrapper is invoked with the `this`
- * binding of the created function.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {*} value The value to wrap.
- * @param {Function} [wrapper=identity] The wrapper function.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var p = _.wrap(_.escape, function(func, text) {
- * return '