Programming challenge: wildcard exclusion in cartesian products

[Aaron Denney]

On 2006-03-23, wkehowski at cox.net <wkehowski at cox.net> wrote:
> The solution that would have the most utility would be one where the
> elements are generated one-by-one, loop-like, so that they can be used
> in the body of a loop, and to avoid the fact that even with exclusion
> the cardinality of the target set EX^n could be in the millions even
> with a full list of wc's, that is, a list containing at least one wc of
> every length in 2..(n-1). I don't know enough Lisp, Haskell or
> Qi/Prolog to know if the solutions so far can be modified to do this.
> The Python program is too slow for large sets.

In Haskell you can get this essentially for free, due to its laziness.

-- 
Aaron Denney
-><-