v class="info ">
<code class="code"><span class="constructor">Hashtbl</span>.filter_map_inplace&nbsp;f&nbsp;tbl</code> applies <code class="code">f</code> to all bindings in
    table <code class="code">tbl</code> and update each binding depending on the result of
    <code class="code">f</code>.  If <code class="code">f</code> returns <code class="code"><span class="constructor">None</span></code>, the binding is discarded.  If it
    returns <code class="code"><span class="constructor">Some</span>&nbsp;ne