bracketOnError, while, forever
GK at ninebynine.org
Thu Feb 10 10:10:18 EST 2005
At 13:33 09/02/05 +0000, Malcolm Wallace wrote:
>Here's another one. I'm not sure what to call it, since 'permutation'
>means something subtly different.
> -- Given a list of alphabets, return all possible strings with one
> -- symbol chosen from each alphabet respectively.
> permute :: [[a]] -> [[a]]
> permute  = []
> permute (xs:xss) = [ f:fs | f <- xs, fs <- permute xss ]
Doesn't 'sequence' do that?
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