Created
October 26, 2010 21:10
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utils.clj
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(defn map-keys | |
"Renames each key of m to the value of generated by f when given the key" | |
[f m] | |
(persistent! | |
(reduce (fn [m [k v]] (assoc! m (f k) v)) (transient {}) m))) | |
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The
transient
version is faster since it isn't modifying the same persistent structure the entire time. http://clojure.org/transients