JSFiddle - React, Tailwind, and code Playground

by charmis

JavaScript

Array.prototype.concatAll = function() {
  var results = [];
  this.forEach(function(subArray) {
    // ------------ INSERT CODE HERE! ----------------------------
    // Add all the items in each subArray to the results array.
    // ------------ INSERT CODE HERE! ----------------------------
    subArray.forEach(function(video) {
      results.push(video);
    });

  });

  return results;
};



var movieLists = [{
  name: "New Releases",
  videos: [{
    "id": 70111470,
    "title": "Die Hard",
    "boxart": "http://cdn-0.nflximg.com/images/2891/DieHard.jpg",
    "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
    "rating": 4.0,
    "bookmark": []
  }, {
    "id": 654356453,
    "title": "Bad Boys",
    "boxart": "http://cdn-0.nflximg.com/images/2891/BadBoys.jpg",
    "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
    "rating": 5.0,
    "bookmark": [{
      id: 432534,
      time: 65876586
    }]
  }]
}, {
  name: "Dramas",
  videos: [{
    "id": 65432445,
    "title": "The Chamber",
    "boxart": "http://cdn-0.nflximg.com/images/2891/TheChamber.jpg",
    "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
    "rating": 4.0,
    "bookmark": []
  }, {
    "id": 675465,
    "title": "Fracture",
    "boxart": "http://cdn-0.nflximg.com/images/2891/Fracture.jpg",
    "uri": "http://api.netflix.com/catalog/titles/movies/70111470",
    "rating": 5.0,
    "bookmark": [{
      id: 432534,
      time: 65876586
    }]
  }]
}];


var movieIds = movieLists.map(function(itemObject) {
  return itemObject.videos
}).concatAll().map(function(video) {
  return video.id
});

var movieIds2 = movieLists.map(function(itemObject) {
  return itemObject.videos.map(function(video) {
    return video.id
  });
}).concatAll();

alert(movieIds.length);
alert(movieIds2.length);