map"><a href="#val-fold_map" class="anchor"></a><code><span class="keyword">val</span> fold_map : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span>init:<span class="type-var">'a</span></span> <span>&#45;&gt;</span> <span>f:<span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <a href="index.html#type-value">value</a> <span>&#45;&gt;</span> <span class="type-var">'a</span> * <a href="index.html#type-value">value</a>)</span></span> <span>&#45;&gt;</span> <span class="type-var">'a</span>