http://stackoverflow.com/questions/43105820/how-to-bing-checkboxes-in-ember-with-a-list

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  //country:'US',
  //allCountries:[{code:'UK'},{code:'US'}]
  selectedCountries: Ember.computed.filterBy('model.AllCountries','isSelected',true),
  init(){
    this._super(...arguments);
   // this.set('AllCountries',[{"code":"US", "name":"USA"}]);
    //this.set('countries',["US", "CA"]);
  }
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
    return {
      'AllCountries':[{"code":"US",name:'US',isSelected:false}, {code:'USA',"name":"USA",isSelected:true}],
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{log model.AllCountries}}
{{#each model.AllCountries as |country|}} 
        <label class="checkbox-inline">{{input type="checkbox" checked=(mut (get country 'isSelected'))}} {{country.name}} </label>
    {{/each}}
<br>
{{#each selectedCountries as |country|}} 
 {{country.name}}
{{/each}}
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}