New Twiddle

application.controller.js

import Ember from 'ember';

function optionsProperty(dependentKey) {
  return Ember.computed(dependentKey, function() {
    return this.get(dependentKey).split(',').map(Function.prototype.call, String.prototype.trim);
  });
}

export default Ember.Controller.extend({
  options: 'Red, Green, Blue',

  values: optionsProperty('options'),

  valuesChanged: false,

  valuesDidChange: Ember.observer('values.[]', function() {
		console.log('valuesDidChange', this.get('allValues'));
    this.set('valuesChanged', true);
  })
});

application.template.hbs

{{input value=options}}<br>
<br>
allValues Changed: {{valuesChanged}}

twiddle.json

{
  "version": "0.4.10",
  "dependencies": {
  	"lodash": "https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.10.1/lodash.js",
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.11/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember-template-compiler.js"
  }
}