title: deleting Ant dirset using regex
body: <p>I am trying to delete a set of directories using a regex expression, but not having much luck at all, can anyone take a look at the target please:</p>
  
  <pre><code>    &lt;delete failonerror="true" includeemptydirs="true"&gt;
          &lt;dirset dir="C:\Users\martin\Desktop\testing" includes="*"&gt;
              &lt;containsregexp expression="[0-9]*-0" /&gt;
          &lt;/dirset&gt;
       &lt;/delete&gt;
  </code></pre>
  
  <p>It just won't delete the files, I want it to match the folder [0-9]*-0 and if it matches it, to delete it</p>