From: Benoit Daloze <eregontp@...>
Date: 2010-05-10T05:56:44+09:00
Subject: Re: Strings iteration

Hi,

You could also use this one liner in ruby-1.9.2(r > 27352), if both
range are identical:

('01'..'03').to_a.repeated_permutation(2) { |x,y| puts "aa#{x}bb#{y}" }
aa01bb01
aa01bb02
aa01bb03
aa02bb01
aa02bb02
aa02bb03
aa03bb01
aa03bb02
aa03bb03

I agree the obvious and flexible solution is still the 2 nested
a.upto(b) tough ( or (a..b).each{} ).

Regards,
B.D.