Check invoke return

controllers.application.js

import Ember from 'ember';

class TestClass {
  someFunction() {
    return 'abc'; 
  }
}

export default Ember.Controller.extend({
  init() {
  	const list = [new TestClass(), new TestClass(), new TestClass()];
    const result = list.invoke('someFunction');
    this.set('result', result);
  }
});

templates.application.hbs

<h1>Check invoke return</h1>
<br>
<br>
{{outlet}}
<br>
<br>
Result: {{result}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}