giles
f8b9bde1a5
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Like Haskell's zipWith but relational. (zip-with-o rel l1 l2 result)
applies a 3-arg combiner relation pointwise: rel l1[i] l2[i] result[i].
(zip-with-o pluso-i (list 1 2 3) (list 10 20 30) q)
-> ((11 22 33))
(zip-with-o (fn (a b r) (== r (list a b))) (list :x :y) (list 1 2) q)
-> (((:x 1) (:y 2)))
Different-length lists fail.
5 new tests, 551/551 cumulative.