[Haskell-cafe] Can't explain this error
Dinh Tien Tuan Anh
tuananhbirm at hotmail.com
Tue Jul 12 09:22:30 EDT 2005
oh damn, thank you
>From: Jon Fairbairn <Jon.Fairbairn at cl.cam.ac.uk>
>To: "Dinh Tien Tuan Anh" <tuananhbirm at hotmail.com>
>CC: robdockins at fastmail.fm, haskell-cafe at haskell.org
>Subject: Re: [Haskell-cafe] Can't explain this error Date: Tue, 12 Jul 2005
>On 2005-07-12 at 12:39-0000 "Dinh Tien Tuan Anh" wrote:
> > i have just encountered another type error.
> > This program tries to print out partitions of a positive integer (i
> > parts 0 = []
> > parts x = [concat (map (y:) parts(x-y) | y<-[1..(x `div` 2)]]
>suspicious spacing! That's the same as
> > parts x = [concat (map (y:)
> | y<-[1..(x `div` 2)]]
>ie you are giving map three arguments when it expects two,
>which is what the type error says.
>Jón Fairbairn Jon.Fairbairn at cl.cam.ac.uk
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