EmberObject

controllers.application.js

import Ember from 'ember';
import EmberObject from '@ember/object';


let India = EmberObject.create({
  capital : 'New Delhi'
});

let China = EmberObject.create({
	capital : 'Beijing'
});

let TamilNadu = EmberObject.create({
  stateCapital : 'Chennai'
});

let capitals = [India, China, TamilNadu];

let capiral = capitals.mapBy('capital')

alert(capiral);