title: How to "replace" an item inside an ember array as of 1.0
body: <p>In ember.js RC5 I was able to replace 2 elements inside an array of ember objects like so</p>
  
  <pre><code>appointments.replace(starting-index, number-of-elements-to-remove);
  </code></pre>
  
  <p>but today that doesn't actually "splice out" the elements as it did pre ember 1.0</p>
  
  <p>If I try to hack it and splice the array myself like so, it does nothing (no error either)</p>
  
  <pre><code>[].concat(appointments).splice(starting-index, number-of-elements-to-remove);
  </code></pre>
  
  <p>Anyone know how to remove / replace elements from a list of ember objects as of 1.0?</p>
  
  <p><strong>Update</strong></p>
  
  <p>The ember inspector shows the model type as DS.RecordArray (using the latest ember-data 1.0 beta 3)</p>
  
  <p>I tried the removeAt but it still doesn't work sadly</p>
  
  <p>This is how I populate the array in my app</p>
  
  <pre><code>var appointments = self.store.all('appointment');
  </code></pre>