Another update

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  _test: undefined,
  init() {
  	this._super(...arguments);
    
    if (!this.get('_test.value')) {
      this.set('_test', {
        value: (new Date())
      });
    } else {
      this.set('cached', 'Sample');
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  arr: [1,2,3]
});

templates.application.hbs

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

{{#each arr as |temp|}}
	{{my-component}}
{{/each}}
<br>
<br>

templates.components.my-component.hbs

{{yield}}

{{#if cached}}
{{cached}}
{{else}}
This is a test component. {{_test.value}} 
{{/if}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}