projectingArrays.js

// Applying a function to a value and creating a new value is called a projection. 
// To project one array into another, we apply a projection function to each item in the array and collect the results in a new array.
// 1.- Traverse the source array
// 2.- Add each item's projected value to a new array
(function() {
	var newReleases = [
		{
			"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 }]
		},
		{
			"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 }]
		}
	];
	
	videoAndTitlePairs = [];

	newReleases.forEach(function(item) {
		videoAndTitlePairs.push({ id: item.id, title: item.title});
	});

	return videoAndTitlePairs;
})();

console.log('videoAndTitlePairs', videoAndTitlePairs);

// Output 
/*
	{
		"id": 70111470,
		"title": "Die Hard"
	},{
		"id": 654356453,
		"title": "Bad Boys"
	},{
		"id": 65432445,
		"title": "The Chamber"
	},
	{
		"id": 675465,
		"title": "Fracture"
	}
*/