title: Check for null or empty value in placeholder text
body: <p>I have a dust.js template that renders inputs based on a hash I am getting from the server. My hangup is that if the hash is empty I still get an input box rendered with an empty placeholder value, how can I check if the placeholder value is null and then hide that box?</p>
  
  <pre><code>&lt;div class='criteria-input'&gt;
    &lt;input type='text' placeholder='{attribute}' value='{value}' size='20'/&gt;
    &lt;span class="close"&gt;X&lt;/span&gt;
  &lt;/div&gt;
  </code></pre>