[Haskell-cafe] A question about monad based on http://en.wikipedia.org/wiki/Monad_(category_theory)

C K Kashyap ckkashyap at gmail.com
Wed Jan 19 05:15:37 CET 2011

Thank you very much Brent,

> > My question is - when we think of Maybe as a functor T:C -> C .... should
> we
> > think that C here refers to Hakell types? As in,
> > (Int and Maybe Int are objects in C) and (Int -> Int and Maybe Int ->
> Maybe
> > Int are arrows in C) and T is an arrow between them. Is that right?
> Yes, exactly.

I really needed this confirmation - thanks.

> There are is also a form of the monad laws in terms of fmap, return,
> join.  For more I recommend checking out
>  http://en.wikibooks.org/wiki/Haskell/Category_theory
> If I am not mistaken, this pages has been updated recently. Thanks.

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