epth-3 menuparent">External Function Examples</a><ul><li id="menu-1343-1" class="first odd sf-item-1 sf-depth-4 sf-no-children"><a href="../../sorting-demo.html" class="sf-depth-4">Ferret sorting demo (1)</a></li><li id="menu-1591-1" class="middle even sf-item-2 sf-depth-4 sf-no-children"><a href="../../ferret-sorting-demo.html" class="sf-depth-4">Ferret sorting demo (2)</a></li><li id="menu-1344-1" class="middle odd sf-item-3 sf-depth-4 sf-no-children"><a href="../../how-to-use-ferret-external-functions-fo