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amalloy/gist:8fff306833f5d0852277 Secret

Created January 31, 2011 21:39
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gistfile1.clj
(defn take-randnth [num coll]
(first
(nth
(iterate (fn [[ret candidates]]
(let [idx (rand-int (count candidates))]
[(conj ret (candidates idx))
(subvec (assoc candidates idx (candidates 0))
1)]))
[[]
(vec coll)])
num)))
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