destroying objects

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  myArray:[1,2,3],
  test: Ember.computed('myArray.[]',function(){
    const myObj = Ember.Object.extend({
    
      willDestroy(){
        console.log('object destroyed');
        this._super(...arguments);
      }
    });
    return this.get('myArray').map(record => {
      return myObj.create({name:'a'});
    });
  }),
  actions:{
    destroyIt(){
      this.get('myArray').popObject();
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#each test as |t|}}
{{t.name}}
{{/each}}
<br>
<br>

<button {{action 'destroyIt'}}>click me</button>

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}