title: Checkbox with ng-model that reflect if another element is showed
body: <p>I have an element checkbox, that I want to reset the value of ng-model when another element is not showed, example: set to false if another element is not showed in my view. ng-show only hide my checkbox, but not reflect in object of controller.</p>
  
  <pre><code>&lt;select ng-model="item.myOption" convert-to-boolean&gt;
    &lt;option value="false" selected&gt;Option false&lt;/option&gt;
    &lt;option value="true"&gt;Option true&lt;/option&gt;
  &lt;/select&gt;
  &lt;input type="checkbox" ng-model="item.myChecked" ng-show="item.myOption"&gt;
  </code></pre>