[Haskell-cafe] Are there arithmetic composition of functions?
jerzy.karczmarczuk at unicaen.fr
Tue Mar 20 02:27:06 CET 2012
> class (Eq a, Show a) => Num a
> where (+) (-) (*) negate abs signum fromInteger
> where functions are for good reason not members of Eq or Show.
This is an old song, changed several times. I have no intention to
discuss, but please, Richard O'Keefe:
WHICH *GOOD* REASONS??
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