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rightfold/gist:a2394f6d9cd785fcc990 Secret

Created November 8, 2014 16:04
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gistfile1.clj
(defn weighted-rand-nth [xs]
(let [t (rand)
ts (map vector (keys xs) (reductions + (vals xs)))]
(ffirst (filter #(> (% 1) t) ts))))
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