Hi Athanasius,
your point about the range-computing subroutine being called only once when using a Perl-style foreach loop (as compared to the "equivalent" C-style loop) is very interesting.
I sometimes wondered, in similar cases, whether I should pre-compute the range limits in order to sort of cache them before entering the for loop, but never actually cared to check, now I know that, in such cases, Perl is actually doing the value caching for you. Good to know. Thank you, Athanasius.
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