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Licenser/gist:1429882

Created December 4, 2011 10:52
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gistfile1.clj
(defn map-keys [f m & [ks]]
(loop [new-map (transient {}) ks ks]
(if (empty? ks)
(persistent! new-map)
(let [[k & ks] ks]
(recur (assoc! new-map k (f (m k))) ks)))))
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