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deque-blog/freq-map-optimized.clj

Created May 9, 2017 13:38
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freq-map-optimized.clj
(defn freq-map
"Optimized version of the frequency map"
[coll]
(let [freqs (java.util.HashMap.)]
(doseq [val coll]
(.put freqs val (inc (get freqs val 0))))
freqs))
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