title: check if json dictionary has empty strings as a value
body: <p>what i am trying to achieve is to show and element only if an element's value within a JSON object is <strong>NOT</strong> equal to an empty string <code>''</code>.</p>
  <h3>For Example:</h3>
  <p>say i have the following json object</p>
  <pre><code>{
      'id' : 23,
      'name' : 'Adrian Reese',
      'age' : '',
      'location' : ''
  }
  </code></pre>
  <p>now with in a partial template where i show the user information i do something like:</p>
  <pre><code>&lt;h1&gt;{{ user.name | capitalize }}&lt;/h1&gt;
  &lt;span class=&quot;age&quot;&gt;Age: {{ user.age }}&lt;/span&gt;
  &lt;span class=&quot;location&quot;&gt;Location: {{ user.location }}&lt;/span&gt;
  </code></pre>
  <p>For each user i want the <code>&lt;span&gt;'s</code> to only be visible if the value is not equal to <code>''</code>. How can i achieve that ?</p>