title: AngularJs inline value undefined and zero
body: <p>I need to show a value in AngularJS inline</p>
  
  <pre><code>&lt;myTag value="entity.order || '*'") /&gt;
  </code></pre>
  
  <p>it displays me <code>*</code> when the <code>order == 0</code>, how to avoid that, setting <code>*</code> only if the order is <code>undefined</code>?</p>