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@oranenj oranenj/scratch.clj
Created Aug 6, 2009

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(defn foo [f pred as bs]
((fn gen [[a & as] [b & bs :as all-bs]]
(when a
(let [p (pred a)]
(lazy-seq
(cons (if p
(f a b) a)
(gen as (if p bs all-bs)))))))
as bs))
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