bind :: Monad m => (a -> m b) -> m a -> m b
Gabriel Gonzalez
gabriel439 at gmail.com
Thu Dec 11 19:58:31 UTC 2014
I agree with Dan here. `(=<<)` is the nicer operator from a theoretical
perspective, because (A) its signature can be generalized to other
categories and (B) it obeys the following functor laws:
(=<<) (f <=< g) = (=<<) f . (=<<) g
(=<<) return = id
If we had to pick one operator to name, `(=<<)` should be the one we pick.
On 12/11/14, 7:34 AM, Dan Burton wrote:
> I like this argument order better, because it shows how (a -> m b)
> gets lifted into (m a -> m b). If we only get one word, and we have to
> choose between naming (>>=) and (=<<), I'd choose the latter for this
> reason.
>
> I don't care what the name is, but having an alphabetic name for most
> operators would be nice. Haskell's custom operators are a turn-off for
> several people I know. I don't think Haskell the language should push
> operators onto people that don't want to use them. Nor should the
> burden be on them to create an alias.
>
> -----
>
> If I could go back and redesign Haskell, I'd make it so that operators
> could only be defined as synonyms of alphabetically-named functions.
>
> infixl 6 (+) = plus
>
>
> -- Dan Burton
>
> On Thu, Dec 11, 2014 at 5:37 AM, Felipe Lessa <felipe.lessa at gmail.com
> <mailto:felipe.lessa at gmail.com>> wrote:
>
> On 11-12-2014 10:38, Henning Thielemann wrote:
> > Thus it is generally a good idea to indent with a fixed size,
> instead of
> > indenting according to function names.
>
> I agree and that's what I do. However, Chris and Oliver indented
> their
> examples by 5 spaces, which is pretty odd (pun intended), so I imagine
> they prefer otherwise and I've listed that as a possible disadvantage.
>
> Cheers, :)
>
> --
> Felipe.
>
>
> _______________________________________________
> Libraries mailing list
> Libraries at haskell.org <mailto:Libraries at haskell.org>
> http://www.haskell.org/mailman/listinfo/libraries
>
>
>
>
> _______________________________________________
> Libraries mailing list
> Libraries at haskell.org
> http://www.haskell.org/mailman/listinfo/libraries
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/libraries/attachments/20141211/045a1adf/attachment.html>
More information about the Libraries
mailing list