[Haskell-beginners] Type classes and synonyms

[Stephen Tetley]

Hi Philip

Aesthetics, taste, sanity, whatever... strongly suggest not doing it of course.

But there is (probably) little harm in trying it.

Best wishes

Stephen

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