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view src/functor_laws_in_haskell.txt @ 29:ed97e5de348d

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author Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
date Thu, 12 Feb 2015 11:28:50 +0900
parents 086fc8bb6ea9
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fmap id      = id
fmap (p . q) = (fmap p) . (fmap q)