Radio Buttons

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  model: function() {
    return { 
      choices: [
       'friend',
       'foe'
      ]
    };
  },
  
  actions: {
    error: function(error) {
      console.log(error.message);
    },
    
    changed: function(value) {
      this.set('currentValue', value);
      console.log('currentValue is: ' + value);
    }
  }
});

helpers.is-equal.js

import Ember from 'ember';

export function isEqual(params) {
  return params[0] === params[1];
}

export default Ember.Helper.helper(isEqual);

templates.application.hbs

<form action="" onchange={{action "changed" value="target.value"}} >
  <input type="radio"
				 name="sex"
         selected={{is-equal currentValue "friend"}} value="friend" />
  <input type="radio"
         name="sex"
         value="foe"
         selected={{is-equal currentValue "foe"}} />
</form>
      
      {{currentValue}}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}