dt class="spec value" id="val-remove_first"><a href="#val-remove_first" class="anchor"></a><code><span class="keyword">val</span> remove_first : <span><span class="type-var">'a</span> list</span> <span>&#45;&gt;</span> <span>f:<span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> bool)</span></span> <span>&#45;&gt;</span> <span><span><span class="type-var">'a</span> list</span> option</span></code></dt><dt class="spec value" id="val-force_until_first_some"><a href="#val-force_until_first_some" clas