Reto 2 Terminado thomtwd@gmail.com

.gitignore

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+node_modules/

challenge_1/challenge_1.js

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+const reduce = ([a,...b],fn,initValue)=>a?reduce(b,fn,fn(initValue,a)):initValue
+const map = (arr,fn)=>reduce(arr,(acc,curr)=>acc.concat(fn(curr,arr)),[])
+const filter = (arr,fn)=>reduce(arr,(acc,curr)=>fn(curr)? acc.concat(curr) :acc,[])
+const print = console.log
+/**
+ * @author Thom Maurick Roman Aguilar - thomtwd@gmail.com
+ * @param {arr} es el array para buscar
+ * @param {value} es el element que será el que comprueba
+ * @return La función retornará un array de array
+ * @example ([2,6,8,0,9,-10,-1]) and 8 => [[2,6] ,[8,0],[9,-1]]
+ */
+
+const filtered = (arr,value)=>{
+    let acc = []
+    const recursive = arr=>{
+        let flag = false
+        const [a,...b]=arr
+        let result = filter(b,item=>item+arr[0]===value)[0]
+        if(result===arr[0]) flag = true
+        if(result!==undefined ) {
+            acc.push([arr[0],result])
+            if(flag) arr.shift()
+            arr.splice(arr.indexOf(result),1)
+        }
+        if(!flag)arr.shift()
+        if(arr.length>0) recursive(arr)
+        return acc
+    }
+    return recursive(arr)
+}
+print(filtered([2,8,6,0,9,-10,-1,6],8))
+print(filtered([2,5,1,7,8,-8,1],3))
+print(filtered([1,2,3,2,7,8,-3],4))
+print(filtered([1,2,4,2,7,8,-3],4))
+print(filtered([1,2,4,2,7,8,-3],8))
+print(filtered( [4, 6, 2, -6, 10],8))
+print(filtered( [1,1,1,8,7,9,0,2],9)) // arreglar -> [[1,8] [7,2] [9,0]]

challenge_1/changelle_2.js

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+class Song{
+    constructor(title,duration,author){
+        this.title=title
+        this.duration = duration
+        this.author=new author(author.name,author.pais)
+    }
+}
+class DB{
+    constructor(songs){
+        this.songs=songs
+    }
+}
+let SpotifyDB
+function spotify(){
+    return {
+        init(){
+            SpotifyDB=new DB([])
+        },
+        addSong(title,duration,author){
+            SpotifyDB.songs.push(new Song(title,duration,author))
+        }
+    }
+}
+//agregar editar eliminar mostrar -- agregar a discografia
+// agregar discografia a autor
+
+let spotifyInstance = spotify()
+
+spotifyInstance.init()
+spotifyInstance.addSong('Cancion 1',4.3,{nombre:'asd',pais:'tango'})
+
+console.log(SpotifyDB);
+
+
+// 12 de la noche el sabado

challenge_2/config/yargs.js

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+const argv = require('yargs')
+
+const id = {
+    alias:'i',
+    demand:true
+}
+const to_list = {}
+const by_id ={id}
+
+const create_artist={
+    id:{
+        alias:'i',
+        demand:true
+    }
+    ,
+    name:{
+        demand:true,
+        alias:'n'
+    },
+    email:{
+        demand:true,
+        alias:'e'
+    },
+    dni:{
+        demand:true,
+        alias:'d'
+    }
+}
+
+
+const create_musical_genre={
+    id,
+    type:{
+        demand:true,
+        alias:'t'
+    }
+}
+const create_album={
+    id,
+    title:{
+        demand:true,
+        alias:'t',
+    },
+    date:{
+        demand:true,
+        alias:'d'
+    },
+    id_artist:{
+        demand:true,
+        alias:'a'
+    }
+}
+
+const create_song={
+    id,
+    id_genre:{
+        demand:true,
+        alias:'g'
+    },
+    id_album:{
+        demand:true,
+        alias:'a'
+    },
+    date:{
+        demand:true,
+        alias:'d'
+    },
+    title:{
+        demand:true,
+        alias:'t'
+    }
+}
+
+const yargs = argv.command('create_artist','Creacion de un artista',create_artist)
+                .command('create_musical_genre','Creacion de un genero musical',create_musical_genre)
+                .command('create_album','Creacion de un album',create_album)
+                .command('create_song','Creacion de una cancion',create_song)
+                .command('to_list_artists','Listar artistas',to_list)
+                .command('show_artist_by_id','Mostrar artista por id',by_id)
+                .command('to_list_songs','Listar canciones',to_list)
+                .command('show_song_by_id','Mostrar cancion por id',by_id)
+                .command('to_list_albums','Listar albumes',to_list)
+                .command('show_album_by_id','Mostrar album por id',by_id)
+                .command('to_list_gs','Listar generos',to_list)
+                .command('show_genre_by_id','Mostrar genero por id',by_id)
+                .command('delete_by_id_song','Eliminar cancion por id',by_id)
+                .command('delete_by_id_artist','Eliminar artista por id',by_id)
+                .command('delete_by_id_album','Eliminar album por id',by_id)
+                .command('delete_by_id_gn','Eliminar genero por id',by_id)
+                .help()
+                .argv
+
+module.exports= {
+    yargs
+}