 class="constructor">Hashtbl</span>.fold</code></a> or <a href="Hashtbl.html#VALiter"><code class="code"><span class="constructor">Hashtbl</span>.iter</code></a> is no longer
   deterministic: elements are enumerated in different orders at
   different runs of the program.
</p><p>

   If no <code class="code">~random</code> parameter is given, hash tables are created
   in non-random mode by default.  This default can be changed
   either programmatically by calling <a href="Hashtbl.html#VALrandomize"><code