#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> array</span> <span>&#45;&gt;</span> <span class="type-var">'a</span></code></dt><dd><p>folder on all possible combinations of size 2 of an array</p></dd></dl><dl><dt class="spec value" id="val-meet_bot"><a href="#val-meet_bot" class="anchor"></a><code><span class="keyword">val</span> meet_bot : <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'b</span> <span>&#4