title: Pushing a knockout observable into a knockout observable array
body: <p>Being that knockout observable arrays only update on changing an element in the array if that element is itself an observable, I am trying to "push" an element into an observable array but make it observable.  I have tried the following statements, but both result in having an undefined value in my observable array:</p>
  
  <pre><code>viewModel.myObservableArray.push(ko.observable());
  </code></pre>
  
  <p>and</p>
  
  <pre><code>viewModel.myObservableArray.push(new ko.observable());
  </code></pre>
  
  <p>what would be the correct way to this?</p>