Reto1 raulrondon

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/Album.js

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+const Song = require ("./Song");
+
+module.exports = class Album {
+    getNumberOfLikes(){
+        let number = 0;
+        for (let s in this.song)
+        {
+            number+=this.song[s].like_number;
+        }
+
+        return number;
+    }
+    addSong(song){
+        this.song.push(song);
+        this.like_number = this.getNumberOfLikes();
+    }
+    deleteSong(song){
+        let index = this.song.indexOf(song);
+        this.song.splice(index,1);
+        this.like_number = this.getNumberOfLikes();
+    }
+    addAuthor(author){
+        this.author.push(author);
+    }
+    deleteAuthor(author){
+        let index = this.song.indexOf(author);
+        this.author.splice(index,1);
+    }
+    constructor({name, author,time, genre, dislike_number, image, upload_date, song}) {
+        this.name = name;
+        this.author = Array.from(author);
+        this.time = time;
+        this.genre = genre;
+        this.song = Array.from(song);
+        this.like_number = this.getNumberOfLikes();
+        this.dislike_number = dislike_number;
+        this.image = image;
+        this.upload_date = upload_date;
+
+    }
+};

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/Author.js

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+module.exports = class Author {
+    constructor({name, country, biography, listeners, followers}) {
+        this.name = name;
+        this.country = country;
+        this.biography = biography;
+        this.listeners = listeners;
+        this.followers = followers;
+    }
+};

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/Song.js

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+module.exports = class Song {
+    constructor({title, album, time, genre, like_number, dislike_number, image, upload_date}) {
+        this.title = title;
+        this.album = album;
+        this.time = time;
+        this.genre = genre;
+        this.like_number = like_number;
+        this.dislike_number = dislike_number;
+        this.image = image;
+        this.upload_date = upload_date;
+    }
+};

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/Spotify.js

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+module.exports = class Spotify {
+    constructor(album, user) {
+        this.album = Array.from(album);
+        this.user = Array.from(user);
+    }
+    addAlbum(newAlbum) {
+        if(this.album.indexOf(newAlbum) === -1)
+            this.album.push(newAlbum);
+    }
+    getAlbum(albumName) {
+        return this.album.find(element => element.name === albumName) || null;
+    }
+    deleteAlbum(albumName) {
+        let album = this.getAlbum(albumName);
+        if(album!==null)
+            this.album.splice(this.album.indexOf(album),1);
+    }
+    addUser(newUser) {
+        let exist = this.user.find(elemento=>elemento.username === newUser.username);
+        if(!exist)
+            this.user.push(newUser);
+    }
+    getUser(username) {
+        return this.user.find(element => element.username === username) || null;
+    }
+    deleteUser(username) {
+        let user  = this.getUser(username);
+        if(user!==null)
+            this.user.splice(this.user.indexOf(user),1);
+    }
+};

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/User.js

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+module.exports = class User {
+    constructor(username,password,email,name,premium) {
+        this.username = username;
+        this.password = password;
+        this.email = email;
+        this.name = name;
+        this.premium = premium || false;
+    }
+};

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/index.js

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+const objectFactory = require("./objectFactory");
+const User = require("./User");
+const Spotify = require("./Spotify");
+
+const author = objectFactory.createObject("Author", {
+  name: "Raul Rondon",
+  country: "Peru",
+  biography: "Peruano de nacimiento",
+  listeners: 100,
+  followers: 100
+});
+
+const author2 = objectFactory.createObject("Author", {
+    name: "Juan Perez",
+    country: "Peru",
+    biography: "Peruano de nacimiento",
+    listeners: 12,
+    followers: 12
+});
+
+const song = objectFactory.createObject("Song", {
+  title: "Rock yourself",
+  album: "Peruana",
+  time: 100,
+  genre: "Rock",
+  like_number: 1000,
+  dislike_number: 10,
+  image: "http://url.com",
+  upload_date: "2019-05-05",
+  country: "Peru",
+  biography: "Peruano de nacimiento",
+  listeners: 100,
+  followers: 100
+});
+
+const song2 = objectFactory.createObject("Song", {
+    title: "Rock yourselfs",
+    album: "Peruanas",
+    time: 100,
+    genre: "Rock",
+    like_number: 100,
+    dislike_number: 10,
+    image: "http://url.com",
+    upload_date: "2019-05-05",
+    country: "Peru",
+    biography: "Peruano de nacimiento",
+    listeners: 100,
+    followers: 100
+});
+
+const album = objectFactory.createObject("Album", {
+  name: "Tu mano",
+  author: [author],
+  time: 100,
+  genre: "Rock",
+  like_number: 1000,
+  dislike_number: 100,
+  image: "https://image.com",
+  upload_date: '2019-05-05',
+  song: [song]
+});
+
+const album3 = objectFactory.createObject("Album", {
+    name: "Como mirarte",
+    author: [author],
+    genre: "Salsa",
+    image: "https://image.com",
+    upload_date: '2019-05-05',
+    song: [song]
+});
+
+const user = new User("rrondon","1234","[email protected]","Raul Rondon Ponce");
+const user_premium = new User("jperez","1234","[email protected]","Juan Perez");
+
+const spotify = new Spotify([album],[user,user_premium]);
+//let album1 = spotify.getAlbum("Como mirarte");
+
+spotify.addAlbum(album);
+spotify.addAlbum(album3);
+spotify.addUser(user_premium);
+
+
+console.log(spotify);
+
+spotify.deleteAlbum(album.name);
+spotify.deleteUser(user_premium.username);
+spotify.deleteUser(user.username);
+console.log(spotify);

Retos/sesion3-reto1/sesion3-reto1-RaulRondon/objectFactory.js

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+const Author = require ("./Author");
+const Album = require ("./Album");
+const Song = require ("./Song");
+const object = {Author,Album,Song}
+
+module.exports = {
+  createObject(type, attributes) {
+    const objectType = object[type];
+    return new objectType(attributes);
+  }
+};

reto1.js

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+const numbers = [2,5,4,6,10,4,0,-8,8,16];
+let numbers_size = numbers.length;
+let hashmap = {};
+let answer = [];
+const n = 8;
+
+function recursionOn(tam) {
+
+    let target = n - numbers[tam-1];
+
+    if (tam<=0)
+        return answer;
+
+    if(!hashmap[target])
+    {
+        hashmap[numbers[tam-1]] = 1;
+    }
+
+    else{
+        let array = [numbers[tam-1],target];
+        answer.push(array);
+    }
+    return (recursionOn(tam-1))
+}
+
+console.log(recursionOn(numbers_size));