Use Ember.isEqual to set checked status
import Ember from 'ember';
import layout from '../templates/components/radio-button';

const {
  Component,
  computed
} = Ember;

export default Component.extend({
  tagName: '',
  layout,

  // value - passed in, required, the value for this radio button
  // groupValue - passed in, required, the currently selected value

  // optionally passed in:
  // disabled - boolean
  // required - boolean
  // name - string
  // radioClass - string
  // radioId - string

  // polyfill hasBlock for ember versions < 1.13
  hasBlock: computed.bool('template').readOnly(),

  joinedClassNames: computed('classNames', function() {
    let classNames = this.get('classNames');
    if (classNames && classNames.length && classNames.join) {
      return classNames.join(' ');
    }
    return classNames;
  }),

  // is this needed here or just on radio-button-input?
  defaultLayout: null, // ie8 support

  checked: computed('groupValue', 'value', function() {
    return Ember.isEqual(this.get('groupValue'), this.get('value'));
  }).readOnly(),

  actions: {
    changed(newValue) {
      this.sendAction('changed', newValue);
    }
  }
});

import Ember from 'ember';
import layout from '../templates/components/radio-button';

const {
  Component,
  computed
} = Ember;

export default Component.extend({
  tagName: '',
  layout,

  // value - passed in, required, the value for this radio button
  // groupValue - passed in, required, the currently selected value

  // optionally passed in:
  // disabled - boolean
  // required - boolean
  // name - string
  // radioClass - string
  // radioId - string

  // polyfill hasBlock for ember versions < 1.13
  hasBlock: computed.bool('template').readOnly(),

  joinedClassNames: computed('classNames', function() {
    let classNames = this.get('classNames');
    if (classNames && classNames.length && classNames.join) {
      return classNames.join(' ');
    }
    return classNames;
  }),

  // is this needed here or just on radio-button-input?
  defaultLayout: null, // ie8 support

  checked: computed('groupValue', 'value', function() {
    return this.get('groupValue') === this.get('value');
  }).readOnly(),

  actions: {
    changed(newValue) {
      this.sendAction('changed', newValue);
    }
  }
});
