Ember Arrays

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Arrays',
  
  foo: [],
  
  bar: Ember.computed('foo', function() {
    console.log('bar called');
  }),
  
  baz: Ember.computed('foo.[]', function() {
    console.log('baz called');
  }),

  actions: {
		addObject() {
      this.get('foo').pushObject({});
      console.log(this.get('foo.length'));
    },
    addObjectJS() {
      let foo = this.get('foo');
      foo.push({});
      console.log(foo === this.get('foo'));
      this.set('foo', foo);
      console.log(this.get('foo'));
    },
    replaceObject() {
    	this.set('foo', []);
    },
    
    outputFoo() {
      console.dir(this.get('foo'));
    }
	}
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<p>See console output</p>
<button {{action "addObject"}}>Add object</button>
<button {{action "addObjectJS"}}>Push object (JS)</button>
<button {{action "replaceObject"}}>Replace object</button>
<button {{action "outputFoo"}}>Output foo</button>

{{bar}}{{baz}}

twiddle.json

{
  "version": "0.7.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "release",
    "ember-data": "release",
    "ember-template-compiler": "release"
  }
}