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robertpfeiffer/gist:51030

Created January 23, 2009 14:45
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gistfile1.clj
(defn cartp
"cartesian product"
([] ())
([coll] (map list coll))
([coll & rest] (for [x coll y (apply cartp rest)] (conj y x))))
(defn closure-under?
[op vals check]
(every? (fn [[a b]] (check (op a b))) (cartp vals vals)))
(defn a-associative?
[op example-vals]
(every? (fn [[a b c]] (= (op a (op b c)) (op (op a b) c)))
(cartp example-vals example-vals example-vals)))
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