Brian Ford btford

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Several developers asked me about how difficult it will be to migrate Angular 1 to Angular 2. Angular 2 isn't done, so I legitimately have no idea how hard it will be. But there are a few high-level guiding principals in the design of Angular 1 that make adapting to changes like this fairly painless.

Angular 1 was designed so it would have a fairly minimal API surface. Let's look at controllers, since these are the meat of your app. Controllers are just functions that get passed other components as arguments:

MyController ($scope) {
  $scope.list = [];
  
  $scope.addItem = function (name) {
    $scope.list.push({

	// this example shows how to write a helper to get something like bindToController
	// in angular 1.2.x
	// this example is incomplete and mostly meant to illustrate the technique

	angular.module('myModule', []).directive('myDir', function () {
	return bindToController({
	scope: {
	foo: '='
	},
	controller: 'MyController',

	var friendlify = function (fn, log) {
	var patsOnTheBack = [
	'you are great',
	'you\'re the best',
	'wow you\'re awesome'
	];
	log = log \|\| console.log;
	return function () {
	var args = arguments;
	log(patsOnTheBack[Math.floor(patsOnTheBack.length * Math.random())] + '!');

	var mutexify = function (fn, lim) {

	var queue = [];
	var inProgress = 0;

	var invokeNext = function () {
	if (queue.length === 0) {
	return;
	}
	if (inProgress >= lim) {

	<snippet>
	<content><![CDATA[[
	{
	id: 1,
	name: 'Batarang',
	img: 'http://25.media.tumblr.com/tumblr_l7s7b3PTAt1qzpwi0o1_500.jpg',
	price: 80
	},
	{
	id: 2,