New Twiddle

controllers.application.js

import Ember from 'ember';

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

index.route.js

import Ember from 'ember';

var myd = 1;
function gmyd(){
  myd ++;
  return myd;
}

export default Ember.Route.extend({
  model(){
    return {
      ds:Ember.ArrayController.create()
    }
  },
  actions:{
    add(ds){
      ds.addObject(gmyd());
    }
  }
});

index.template.hbs

{{#each model.ds  as |d|}}
  {{d}}
{{/each}}
<button {{action "add" model.ds}}>add</button>

templates.application.hbs

{{outlet}}

twiddle.json

{
  "version": "0.4.6",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.5/ember.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.5/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.5/ember-template-compiler.js"
  }
}