dex.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-map_mut"><a href="#val-map_mut" class="anchor"></a><code><span class="keyword">val</span> map_mut : <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'a</span>)</span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> unit</code></dt><dd><p>Map the function on the vector mutably by replacing each cell by the result of the func