array

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  myStore: Ember.inject.service(),
  
  actions: {
    addTodo() {
      this.get('myStore').addTodo();
    }
  }
});

services.my-store.js

import Ember from 'ember';

export default Ember.Service.extend({
  
  todos: [],
  
  addTodo() {
    this.get('todos').pushObject('new item');
  }
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>

<button {{action 'addTodo'}}>Add</button>
{{#each myStore.todos as |todo|}}
  <p>{{todo}}</p>
{{/each}}

twiddle.json

{
  "version": "0.7.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember-template-compiler.js"
  }
}