New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  model: Ember.computed(function() {
    return [
      Ember.Object.create({ name: 'Sophie', team: null }),
      Ember.Object.create({ name: 'Bob', team: null })
    ]
  })
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<table class="table">
  <thead class="thead-inverse">
    <tr>
      <th>Name</th>
      <th>Team Speedy</th>
      <th>Team Alpha</th>
      <th>Team Invincible</th>
    </tr>
  </thead>
  <tbody>
    {{#each model as |signed-player|}}
      <tr>
        <td> {{signed-player.name}} </td>
        <td> <input name={{concat signed-player.name '-team'}} type='radio' value="Speedy" onchange={{action (mut signed-player.team) value="target.value"}}> </td>
        <td> <input name={{concat signed-player.name '-team'}} type='radio' value="Alpha" onchange={{action (mut signed-player.team) value="target.value"}}> </td>
        <td> <input name={{concat signed-player.name '-team'}} type='radio' value="Invincible" onchange={{action (mut signed-player.team) value="target.value"}}> </td>
      </tr>
    {{/each}}
  </tbody>
</table>

{{#each model as |signed-player|}}
  <p><b>{{signed-player.name}}</b> is on the following team: <b>{{signed-player.team}}</b></p>
{{/each}}

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}