Map to array demo

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  computedValue: Ember.computed('thing.value', function() {
    return this.get('thing.value') + '!!!';
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  mapAsArray: Ember.computed('myMap', function() {
    const myMap = this.get('myMap');
    const myArray = [];
    for (const key in myMap) {
      myArray.push({
        id: key,
        value: myMap[key]
      });
    }
    
    return myArray
  }),
  
  thing: Ember.on('init', function() {
    this.set('myMap', {123: 'abc', 456: 'def', 789: 'ghi'});
  	
    Ember.run.later(() => {
      this.set('myMap', {123: '555', 456: 'def', 789: '999'});
    }, 2000);
  }),
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#each mapAsArray as |thing|}}
{{my-component thing=thing}}
{{/each}}
{{outlet}}
<br>
<br>

templates.components.my-component.hbs

key: {{thing.id}}
<br>
value: {{thing.value}}
<br>
computedValue: {{computedValue}}
<hr>

{{yield}}

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": {}
}