the <code class="code"><span class="constructor">OCAMLRUNPARAM</span></code> environment variable.<br>
<b>Before 4.00.0 </b> the <code class="code">random</code> parameter was not present and all
   hash tables were created in non-randomized mode.<br>
</p></div>

<pre><span id="VALclear"><span class="keyword">val</span> clear</span> : <code class="type">('a, 'b) <a href="Hashtbl.html#TYPEt">t</a> -&gt; unit</code></pre><div class="info ">
Empty a hash table. Use <code class="code">reset</code> instead of <c