bracketOnError, while, forever
ross at soi.city.ac.uk
Wed Feb 9 08:37:42 EST 2005
On Wed, Feb 09, 2005 at 01:33:37PM +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 ]
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