t <span class="arrow">&#45;&gt;</span></span> <span><span>(<span><a href="#type-elt">elt</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-elt">elt</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-elt">elt</a>)</span> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-arr">arr</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-arr">arr</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-one_hot"><a href="#val