[Haskell-beginners] \x -> x < 0.5 && x > -0.5

[Luca Ciciriello]

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 at alumni.caltech.edu
> To: beginners at 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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