check-ember-composable-helpers

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  someCollection: [
    { id: 1 },
    { id: 2 },
    { id: 3 },
    { id: 4 },
    { id: 5 },
  ],
  
  actions: {
    isEven(id) {
			return id % 2 == 1;
    },
    
    addElements() {
      alert('add more')
      this.set('someCollection', [
       { id: 1 },
       { id: 2 },
       { id: 3 },
       { id: 4 },
       { id: 5 },
       { id: 6 },
       { id: 7 },
       { id: 8 },
      ]);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
some collection
<br>
<h1>collection filtered</h1>
<ul>
{{#each (filter-by 'id' (action 'isEven') someCollection) as |item| }}
 <li>{{item.id}}</li>
{{/each}}
</ul>
<br>

<button type='button' onclick={{action 'addElements'}}>add more</button>
<br>
{{#each someCollection as |item| }}
 <li>{{item.id}}</li>
{{/each}}

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": {
    "ember-composable-helpers": "1.1.3"
  }
}