Added Collection::implode($glue, $callback)

Author: pdscopes

src/Collection.php

@@ -338,6 +338,19 @@ public function isEmpty()
         return empty($this->items);
     }
 
+    /**
+     * Implode the collection values.
+     *
+     * @see implode()
+     * @param string        $glue
+     * @param callable|null $callback
+     * @return string
+     */
+    public function implode($glue = '', callable $callback = null)
+    {
+        return implode($glue, $callback ? array_map($callback, $this->items) : $this->items);
+    }
+
 
     /**
      * @InheritDoc

tests/Unit/CollectionTest.php

@@ -328,7 +328,7 @@ public function testHas()
         $this->assertFalse($collection->has('four'));
     }
 
-    public function testEmpty()
+    public function testIsEmpty()
     {
         $items1 = [];
         $items2 = [1,2,3,4];
@@ -339,6 +339,16 @@ public function testEmpty()
         $this->assertFalse($collection2->isEmpty());
     }
 
+    public function testImplode()
+    {
+        $items       = [1.5,2.5,3.5,4.5];
+        $collection = new Collection($items);
+
+        $this->assertEquals('1.5,2.5,3.5,4.5', $collection->implode(','));
+        $this->assertEquals('1,2,3,4', $collection->implode(',', 'floor'));
+        $this->assertEquals('2,3,4,5', $collection->implode(',', 'ceil'));
+    }
+
     public function testToArray()
     {
         $items      = [1,2,3,4];