New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  
  something: Ember.computed(function() {
    return 'Something';
	}),
  
  list: Ember.computed('something', function() {
    return [{
    	aliasSomething: this.get('something')
    }, {
      aliasSomething: this.get('something')
    }];
	}),
  
  actions: {
     setSomething: function(something) {
     	this.set('something', something);
     }
  }     
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

{{#each list as |item|}}
	{{item.aliasSomething}}
{{/each}}

<button {{action 'setSomething' 'something else'}}>Set to something else</button>
<br>
<br>

twiddle.json

{
  "version": "0.4.8",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.8/ember.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.9/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.8/ember-template-compiler.js"
  }
}