n></code> if there is no value associated with <code class="code">a</code> in the
   list <code class="code">l</code>.<br>
</div>
<pre><span id="VALassq"><span class="keyword">val</span> assq</span> : <code class="type">'a -&gt; ('a * 'b) list -&gt; 'b</code></pre><div class="info">
Same as <a href="List.html#VALassoc"><code class="code"><span class="constructor">List</span>.assoc</code></a>, but uses physical equality instead of structural
   equality to compare keys.<br>
</div>
<pre><span id="VALmem_assoc