New Twiddle

controllers.application.js

import Ember from 'ember';

const {
  get,
  set
} = Ember;

export default Ember.Controller.extend({
  activeIndex: 0,
  sweaters: Ember.A([{
    id: 1,
    title: 'foo',
    status: null
  }, {
    id: 2,
    title: 'bar',
    status: null
  }, {
    id: 3,
    title: 'baz',
    status: null
  }]),
  
  actions: {
    reaction(value) {
      let activeIndex = get(this, 'activeIndex');
      let sweaters = get(this, 'sweaters');
      let sweater = sweaters.objectAt(activeIndex);
      set(sweater, 'status', value);
      
      this.incrementProperty('activeIndex');
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<ul>
{{#each sweaters as |item|}}
	<li>{{item.title}} - {{item.status}}</li>
{{/each}}
</ul>
<br>
<button {{action 'reaction' 'no'}}>no</button>
<button {{action 'reaction' 'yes'}}>yes</button>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}