Had you considered list comprehension?
 
[x | x <- xs, x < 0.5 && x > -0.5]

Luca.
 
 
> Date: Mon, 19 Oct 2009 01:49:17 -0700
> From: mpm@alumni.caltech.edu
> To: beginners@haskell.org
> Subject: [Haskell-beginners] \x -> x < 0.5 && x > -0.5
>
> Is there a nifty way to write
>
> filter (\x -> x < 0.5 && x > -0.5) xs
>
> without explicitly using x?
>
> Maybe arrows? I have a vague understanding that arrows can "send" an
> argument to more than one computation.
>
> -Mike
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