New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  data: ['Hey', 'Hello', 'Hi', 'Hola']
});

helpers.inc.js

import Ember from 'ember';
import { assert } from 'ember-debug';

export function inc(params/*, hash*/) {
  return params[0] + 1;
}

export default Ember.Helper.helper(inc);

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{#each data as |d index|}}
<div>{{d}} (index: {{index}}, number: {{inc index}})</div>
{{/each}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}