[Haskell-beginners] Type classes and synonyms
stephen.tetley at gmail.com
Sat Nov 21 13:13:02 EST 2009
Aesthetics, taste, sanity, whatever... strongly suggest not doing it of course.
But there is (probably) little harm in trying it.
2009/11/21 Philip Scott <haskell-beginners at foo.me.uk>:
> Oooh I had no idea you could do that with 'instance'
> > instance Num a => Num [a] where
> > (+) = zipWith (+)
> > (-) = zipWith (-)
> > (*) = zipWith (*)
> > fromInteger = repeat . fromInteger
> > abs = map abs
> > signum = map signum
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