L486-L507" target="_blank">v&nbsp;3.0</a></h6>
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                        <pre class="source"><code class="clojure">(defn smap-indexed!
  [ova pchk f]
  (let [idx (indices ova pchk)]
    (doseq [i idx]
      (alter (nth @ova i) #(f i %))))
  ova)</code><