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Last active August 29, 2015 14:05
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gistfile1.clj
(defn changes
([coll]
(cons (first coll)
(lazy-seq (changes (rest coll) (first coll)))))
([coll last]
(when-let [next (first coll)]
(if (not= last next)
(cons next (lazy-seq (changes (rest coll) next)))
(lazy-seq (changes (rest coll) last))))))
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