id="val-flat_map"><a href="#val-flat_map" class="anchor"></a><code><span class="keyword">val</span> flat_map : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span>)</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span></code></dt></dl></details></div></div></div>