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noidi/gist:343741

Created March 25, 2010 16:15
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gistfile1.clj
(defn maybe-reduce [f a l]
"Short-circuits if f returns nil."
(if (seq l)
(let [[b & cs] l
fab (f a b)]
(if cs
(if (nil? fab)
nil
(recur f fab cs))
fab))
a))
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