New Twiddle

application.controller.js

import Ember from 'ember';

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

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<p>Check the console</p>
{{outlet}}
{{test-test 'foo'}}
{{test-test 'foo' 'bar'}}

helpers.test-test.js

import Ember from 'ember';

export function testTest(params) {
  Ember.Logger.info('params has', params.length, 'values');
  Ember.Logger.info('typeof params', typeof params);
  console.dir(params);
}
  
export default Ember.Helper.helper(testTest);

twiddle.json

{
  "version": "0.4.11",
  "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"
  }
}