[Haskell-cafe] IO (Either a Error) question

[Brandon S. Allbery KF8NH]

On May 9, 2010, at 06:18 , Ben Millwood wrote:
> On Sun, May 9, 2010 at 7:27 AM, wren ng thornton <wren at freegeek.org>  
> wrote:
>>
>> The only examples I can think of where we'd want 'fail'-able  
>> patterns are
>> entirely pedagogical (and are insignificantly altered by not using
>> 'fail'-able patterns). I can't think of any real code where it would
>> actually help with clarity.
>
> You're not a fan of e.g.
>
> catMaybes xs = [x | Just x <- xs]

I've always had the feeling that if I need catMaybes, I haven't  
thought through the data representation (or possibly manipulation)  
fully.

-- 
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH


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