&gt; ('a, 'b) <a href="Hashtbl.html#TYPEt">t</a> -&gt; 'c -&gt; 'c</code></pre><div class="info ">
<code class="code"><span class="constructor">Hashtbl</span>.fold f tbl init</code> computes
   <code class="code">(f kN dN ... (f k1 d1 init)...)</code>,
   where <code class="code">k1 ... kN</code> are the keys of all bindings in <code class="code">tbl</code>,
   and <code class="code">d1 ... dN</code> are the associated values.
   Each binding is presented exactly once to <code class="code">f</code>.
<p>

  