[Haskell-beginners] Arrow vs. function

[John Wiegley]

>>>>> John Wiegley <johnw at newartisans.com> writes:

> Arrows abstract functions, allowing you to have constructions like Kleisli,
> which are Arrows, but compose in the presence of effects using (<=<) rather
> than (.).

That is, you compose them using (<<<) as you would using any other Arrow, but
the Arrow instance is using a different form of composition under the hood.

John