Array.reduce

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce

by Daniel Brose

JavaScript

var track_data = {
  "album" : {
    "album_type" : "single",
    "artists" : [ {
      "external_urls" : {
        "spotify" : "https://open.spotify.com/artist/7L2rePM60cIztWZ7cLlskE"
      },
      "href" : "https://api.spotify.com/v1/artists/7L2rePM60cIztWZ7cLlskE",
      "id" : "7L2rePM60cIztWZ7cLlskE",
      "name" : "Martin Luke Brown",
      "type" : "artist",
      "uri" : "spotify:artist:7L2rePM60cIztWZ7cLlskE"
    } ],
    "available_markets" : [ "AD", "AE", "AR", "AT", "AU", "BE", "BG", "BH", "BO", "BR", "CA", "CH", "CL", "CO", "CR", "CY", "CZ", "DE", "DK", "DO", "DZ", "EC", "EE", "EG", "ES", "FI", "FR", "GB", "GR", "GT", "HK", "HN", "HU", "ID", "IE", "IL", "IN", "IS", "IT", "JO", "JP", "KW", "LB", "LI", "LT", "LU", "LV", "MA", "MC", "MT", "MX", "MY", "NI", "NL", "NO", "NZ", "OM", "PA", "PE", "PH", "PL", "PS", "PT", "PY", "QA", "RO", "SA", "SE", "SG", "SK", "SV", "TH", "TN", "TR", "TW", "US", "UY", "VN", "ZA" ],
    "external_urls" : {
      "spotify" : "https://open.spotify.com/album/2rTg1Ce2QyVnC9zSMLt1Va"
    },
    "href" : "https://api.spotify.com/v1/albums/2rTg1Ce2QyVnC9zSMLt1Va",
    "id" : "2rTg1Ce2QyVnC9zSMLt1Va",
    "images" : [ {
      "height" : 640,
      "url" : "https://i.scdn.co/image/7e49deeec751ef161300dab7141ecb0e1d94f791",
      "width" : 640
    }, {
      "height" : 300,
      "url" : "https://i.scdn.co/image/857200d71ee3f00d849a89f5e585b0b6141baf53",
      "width" : 300
    }, {
      "height" : 64,
      "url" : "https://i.scdn.co/image/53d550013e61124f7f8ef3d21a7e7f3b0192dad4",
      "width" : 64
    } ],
    "name" : "Opalite",
    "release_date" : "2017-09-15",
    "release_date_precision" : "day",
    "total_tracks" : 1,
    "type" : "album",
    "uri" : "spotify:album:2rTg1Ce2QyVnC9zSMLt1Va"
  },
  "artists" : [ {
    "external_urls" : {
      "spotify" : "https://open.spotify.com/artist/7L2rePM60cIztWZ7cLlskE"
    },
    "href" : "https://api.spotify.com/v1/artists/7L2rePM60cIztWZ7cLlskE",
    "id" :...