New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  first_dict: [{"name":"xfd"},{"name":"yfd"},{"name":"z"}],
second_dict: [{"name":"xsd"},{"name":"ysd"}]
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#each first_dict key='name' as |first index|}}
  Index: {{index}}
  {{log (to-string index)}}
  {{log '0'}}

  Second dict value: {{get (get second_dict (to-string index)) 'name'}}
  <br/>
{{/each}}
<br>
<br>

helpers.to-string.js

import Ember from "ember";

export default Ember.Helper.helper(function(params) {
  return params[0].toString();
});

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/2.0.0/ember.debug.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.0.0/ember-template-compiler.js"
  }
}