But the outer  for my $i (0..scalar @sig) { ... } in both loop examples still seems to me to have an inherent off-by-one error. This error is masked by the fact that  $#sig is used as the range limit in the  $i+1..$#sig range expression of both inner loops.

But the inherent error (as I consider it) still remains, and must be fixed up or masked or otherwise dealt with in some way, and poses a potential pitfall for future programmers and maintainers. Why not use the more idiomatic (and IMHO correct)  for my $i (0 .. $#sig) { ... } form in both outer loops?

Give a man a fish:  <%-{-{-{-<

In reply to Re^2: For loop abortions by AnomalousMonk
in thread For loop abortions by Sellerzzz

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