title: bind selector options to variable
body: <p>I have some code that's a bool 'public'.  I want to create a select that allows the user to change this.  Here's how I've done it:</p>
  
  <pre><code>&lt;select class="prompter-public-textfield" ng-model=selectedItem.public
                                            value={{selectedItem.public}}&gt;
      &lt;option&gt;Public&lt;/option&gt;
      &lt;option&gt;Non-public&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>The issue is 'public' is 0 and 1, but this doesn't make much sense to the user.  Is there any elegant way to display 'Public' and 'Non-public' in the selector, but bind this to 0 and 1 in my object?  (I'm trying not to create another variable or use a onchange to modify).</p>
  
  <p>Thanks!</p>