d">val</span> empty : unit <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-from_list"><a href="#val-from_list" class="anchor"></a><code><span class="keyword">val</span> from_list : <span><span class="type-var">'a</span> list</span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-map"><a href="#val-map" class="anchor"