value">value</a>)</span> <span class="xref-unresolved">Stdlib</span>.Seq.t</span></span></code></div></div></details></div><div class="odoc-spec"><div class="spec value anchored" id="val-mapi"><a href="#val-mapi" class="anchor"></a><code><span><span class="keyword">val</span> mapi : 
  <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span class="label">f</span>:
    <span>(<span><a href="#type-key">key</a> <span class="arrow">&#45;&gt;</span></span>
      <span><span>(<a hr