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chrismo/gist:17d3fe00b5117d394aa2

Created February 24, 2015 15:50
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4clojure 54
Raw
gistfile1.clj
(fn [x coll]
(keep #(if (= (count %) x) % nil)
(map #(map last %)
(vals
(group-by
#(quot (first %) x)
(map-indexed #(vector % %2) coll)))))
)
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