Of course, with 5.9.2, there is a much nicer way to construct an efficient regular expression to match the numbers from 0 to 255 without leading zeroes:

use strict;
my $zero_to_255 = join "|", 0..255;
$zero_to_255 = qr(^(?:$zero_to_255)$);
print $zero_to_255,"\n";
for (-2,-1, 0..259) {
  print "$_\n" 
    unless /$zero_to_255/;
};

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In reply to Re: Regexp for range of numbers by Corion
in thread Regexp for range of numbers by loris

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