Re: [Haskell-beginners] f . g or f g or f $ g?

Hi, Dnia 2013-02-01, pią o godzinie 20:42 +0100, Martin Drautzburg pisze:

Hello all

I frequently get confused over f . g vs f g. I do understand the following

With:

g :: a->b f :: b ->c

f.g :: a->c

However

f g

is a type error, because then f would have to accept a function (a->b) as its first parameter, but it only accepts a b.

Is there a way to easily remember when to use f.g and when to use f g without having to do this type algebra.

Maybe this could be a hint, consider this: f . g == (.) f g Emanuel