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

On May 9, 2010, at 06:18 , Ben Millwood wrote:

On Sun, May 9, 2010 at 7:27 AM, wren ng thornton 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@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH