New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  items: [{'name': 'Bob'}]
});

application.template.hbs

{{my-component items=items}}

my-component.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
  	setName(name) {
    	this.get('items.firstObject').set('name', name);
    }
  }
});

my-component.template.hbs

{{items.[0].name}}
<button {{action 'setName' 'Dylan'}}>Set name</button>

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}