New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  areTheSame: Ember.computed(
    'model.{myProp,myComputedProp}',
    function() {
      return this.get('model.myProp') === this.get('model.myComputedProp');
    }
  )
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return Ember.Object.extend({
      myProp: 'My String',
      
      myComputedProp: Ember.computed(function() {
        return this.get('myProp');
      })
    }).create();
  }
});

templates.application.hbs

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

templates.index.hbs

<p>
 myProp: {{model.myProp}}
</p>
<p>
 myComputedProp: {{model.myComputedProp}}
</p>

<p>
are they the same?: {{areTheSame}}
</p>

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}