HeroicEric/ember-group-by#11

controllers.application.js

import Ember from 'ember';
import groupBy from 'ember-group-by';

const { computed } = Ember;

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  meetings: computed.readOnly('model'),
  meetingsPerDay: groupBy('meetings', 'day')
});

routes.application.js

import Ember from 'ember';
import moment from 'moment';

const { computed, get } = Ember;

const Meeting = Ember.Object.extend({
  date: null,
  day: computed('date', function() {
    let date = get(this, 'date');
    return moment(date).format('LL');
  }),
  topic: null
});

export default Ember.Route.extend({
  model() {
    return [
      Meeting.create({
        date: moment('2016-10-11 12:00'),
        topic: 'foo'
      }),
      Meeting.create({
        date: moment('2016-10-11 15:00'),
        topic: 'bar'
      }),
      Meeting.create({
        date: moment('2016-10-12 08:00'),
        topic: 'baz'
      })
    ];
  }
});

templates.application.hbs

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

{{#each meetingsPerDay as |meetingsForDay|}}
	<h2>{{meetingsForDay.value}}</h2>
  <ul>
  	{{#each meetingsForDay.items as |meeting|}}
    	<li>{{moment-format meeting.date 'LT'}}: {{meeting.topic}}</li>
    {{/each}}
  </ul>
{{/each}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.0",
    "ember-template-compiler": "2.6.0",
    "ember-testing": "2.6.0"
  },
  "addons": {
  	"ember-moment": "4.1.0",
    "ember-group-by": "0.0.3"
  }
}