 comparison function on each until the comparison function returns true.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">x</td><td>The hashtab instance. </td></tr>
    <tr><td class="paramname">o</td><td>The address to pointer that will be set with the matching item. </td></tr>
    <tr><td class="paramname">cmpfn</td><td>The function used to determine a match in the list. </td></tr>
    <tr><td class="paramname">cmpdata</td><td>An argument to be passed t