title: Knockout js conditional options binding
body: <p>In Knockoutjs is it possible to have a condition for the child elements for a options binding</p>
  
  <p>e.g:</p>
  
  <pre><code>viewModel.array([{name: 1, show: true}, {name: 2, show: false}, {name: 3, show: true}]);
  
  &lt;select data-bind="options: array, optionsText: name, if: show"&gt;&lt;/select&gt;
  </code></pre>
  
  <p>will show in select box:</p>
  
  <pre><code>1
  3
  </code></pre>