get array access

controllers.application\.js

import Controller from '@ember/controller';
import { get } from '@ember/object';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';

	foo = [{ bar: '1' }, { bar: '2'}, { bar: '3'}];

	get fooFirstBar() {
    return get(this, 'foo.firstObject.bar');
  }

	get fooOneBar() {
    return get(this, 'foo.1.bar');
  }

	get fooLastBar() {
    return get(this, 'foo.lastObject.bar');
  }
}

templates.application\.hbs

{{fooFirstBar}}
<br>
{{fooOneBar}}
<br>
{{fooLastBar}}

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}