 the iterator calls returns a non-zero value.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="list">list</td><td class="desc">
<p>A handle to the list.</p>
</td></tr>
<tr><td class="val" id="iterator">iterator</td><td class="desc">
<p>An iterator function, called on each node of the list.</p>
</td></tr>
<tr><td class="val" id="user">user</td><td class="desc">
<p>A user-supplied field that is passed as the second argument to the iterator.</p>
</td></tr>
</table>

<h4>return</h4>

<p>The res