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amalloy/parens.clj

Forked from djtrack16/parens.clj
Last active August 29, 2015 14:13
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parens.clj
(fn [o]
(set
((fn q [s o c]
(apply concat
(let [a (when (pos? o)
(q (concat s "(") (dec o) (inc c)))
b (when (pos? c)
(q (concat s ")") o (dec c)))]
(if (and (zero? o) (zero? c))
[[(clojure.string/join s)]]
[a b]))))
"" o 0)))
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