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amalloy/amalloy-4clojure-solution114.clj

Forked from anonymous/amalloy-4clojure-solution114.clj
Created September 12, 2011 04:05
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amalloy-4clojure-solution114.clj
;; amalloy's solution to Global take-while
;; https://4clojure.com/problem/114
(fn f [n pred coll]
(lazy-seq
(when-let [[x & xs] (seq coll)]
(let [n (if (pred x), (dec n), n)]
(when-not (zero? n)
(cons x (f n pred xs)))))))
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