Re: Simple way to create a rainbow table

[AnomalousMonk]

While not, as BrowserUk points out, a 'rainbow table', what you have is certainly a permutation and is also a good first approximation to an infinite stream. Dominus's Higher Order Perl is a very good discussion of iterator-based approaches to these topics (for which, see the index) and quite a few others, and is available as a free download here.