New Twiddle

application.controller.js

import Ember from 'ember';

var myName = Ember.Object.extend({
  name: "Erik Hanchett",
  otherName: Ember.computed.oneWay('name')
});

var erik = myName.create();

//console.log(erik.get('name'));
//console.log(erik.get('otherName'));

var User = Ember.Object.extend({
  firstName: null,
  lastName: null,
  nickName: Ember.computed.oneWay('firstName')
});

var user = User.create({
  firstName: 'Erik',
  lastName:  'Hanchett'
});

console.log(user.get('nickName'));              // 'Erik'
user.set('nickName', 'Bravo'); // 'Bravo'
console.log(user.get('firstName'));             // 'Erik'

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  name: 'erik',
  oneWay: Ember.computed.oneWay('name')
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{name}}
<br>
{{input value=oneWay}}
<br>
{{oneWay}}
<br>
<br>

twiddle.json

{
  "version": "0.4.10",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/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"
  }
}