Thanks, your code is indeed terser but I wouldn't really call it more elegant ;)

That's up to you ;-P

From what I understand are you caching the values for the next iteration, this brakes my semantics and might cause side effects.

Yes, but that can of course be rewritten. Though I don't understand how it could cause side effects if your "wheels" are not iterators themselves (unless of course you've got tied values or something like that)? My code is based on Higher-Order Perl, the algorithm is on page 131. If you're working on iterator stuff, the entire chapter on that might very well be worth a read.

In reply to Re^5: Efficient but elegant Cross-Product iterator ? (updated) by haukex
in thread Efficient but elegant Cross-Product iterator ? by LanX

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