title: How to access variable keys in an associative array in fluid?
body: <p>I assign an associative array <code>values</code> to my view in the action controller.</p>
  
  <p><code>&lt;f:debug&gt;{values}&lt;/f:debug&gt;</code> outputs the following, which means, the data is in the view.</p>
  
  <pre><code>array (3 items)
      63 =&gt; 158 (integer)
      49 =&gt; 0 (integer)
      164 =&gt; 0 (integer)
  </code></pre>
  
  <p>In my fluid template I have a loop over some items. In that loop, I create select fields with the f:form.select viewhelper. The form is not bound to an object, I can not use the property argument. But I want to reflect the current (last selected) value of each of the select fields.</p>
  
  <p>Each select is named <code>filter_{loopItem.uid}</code>.</p>
  
  <p><code>&lt;f:debug&gt;{values.63}&lt;/f:debug&gt;</code> outputs <code>158 (integer)</code> wich is correct, too.
  If I set <code>value={values.63}</code> in the value argument of the f:form.select viewhelper, the corresponding option is selected in filter_63.</p>
  
  <p>What I want to do, is use the uid as index for the filters array, so that I can write something like <code>value={values.{loopItem.uid}}</code> and the select selects the corresponding option. But this does not work, debug outputs NULL.</p>
  
  <p>{values.63} with a constant 63 works fine.
  Even an alias mapped {index: loopItem.uid} with {values.index} results in NULL.</p>
  
  <p>How can I substitute the fixed 63 by a variable value based on the loopItem.uid?</p>