/span> list</span> <span>&#45;&gt;</span> unit</code></dt><dt class="spec value" id="val-fold2_result"><a href="#val-fold2_result" class="anchor"></a><code><span class="keyword">val</span> fold2_result : <span>init:<span class="type-var">'acc</span></span> <span>&#45;&gt;</span> <span>f:<span>(<span class="type-var">'acc</span> <span>&#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'b</span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'acc</span>