Created
November 15, 2017 08:55
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| > :set -XRankNTypes | |
| > :{ | |
| | twoList :: [a] -> [b] -> (forall c. [c] -> d) -> (d, d) | |
| | twoList xs ys f = (f xs, f ys) | |
| | :} | |
| > twoList [1,2,3,4,5] ["hoge","fuga","piyo"] length | |
| (5,3) |
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