Programming challenge: wildcard exclusion in cartesian products

funkyj funkyj at
Sat Mar 18 03:12:57 CET 2006

wkehowski at wrote:
> It would seem that your program is just filtering the full cartesian
> product, right? The solution I'm looking for generates the elements
> one-by-one so that it could be used in a loop.

One advantage of a generator over filtering the full product is that I,
as the user of the generator, am not obligated to iterate over the
entire solution space.

Are there other _practical_ advantages of generators over mapping &
filtering complete sets?

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