title: How to remove elements in content array of  ArrayController (Ember)
body: <p>I have a model like:</p>
  
  <pre class="lang-js prettyprint-override"><code>TestModel = Em.Object.create({
      id:'',
      name:''
  })
  </code></pre>
  
  <p>and a object ArrayController like:</p>
  
  <pre class="lang-js prettyprint-override"><code>testArrayController = Em.ArrayController.create({
      content: [],
      init: function() {
          //push some object TestModel
      }
  });
  </code></pre>
  
  <p>I want to remove some objects depend on id property of a object in content array. How to do that?</p>