On Sun, Dec 25, 2005 at 11:09:51AM +0000, Branimir Maksimovic wrote:
Or just 'mapM_ doSomething [1..10]' (:
Neet! However would it be more efficient for, say, 1 million iterations? Anyway I have to look for map functions. I'm learning step by step from tutorials :)
I remember I was impressed when I checked what GHC made of such code. No lists, no allocations, just a tight loop :-) BTW, in my library of small Haskell utilities I have for_ l f = mapM_ f l for l f = mapM f l and I use it like this for_ [1..10] $ \i -> do do something with i It's just because there's often more code in f than in l. When I don't have my handy little library, I use a more baroque syntax: (`mapM_` [1..10]) $ \i -> do do something with i Now that I think about it, this variant would be nicer: flip mapM_ [1..10] $ \i -> do do something with i Best regards Tomasz -- I am searching for a programmer who is good at least in some of [Haskell, ML, C++, Linux, FreeBSD, math] for work in Warsaw, Poland