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Loops: You read the OP a bit more slowly and carefully, and came closer, I think, to answering codz67's question as a result. But the  (\.\d+)? is redundant for the given inputs and outputs if the negative look-ahead is used. (Had it been needed, it would probably have been better as a  (?:...) non-capturing group.)

c:\@Work\Perl>perl -wMstrict -le "my @t = qw( regex regex.1 regex.12 regex.1a regex.a regex.a +1 oregex.2 ); for (@t) { printf qq{'$_'}; printf ' matches!' if /^regex(?!\.[^\d])/; print ''; } " 'regex' matches! 'regex.1' matches! 'regex.12' matches! 'regex.1a' matches! 'regex.a' '' 'regex.a1' 'oregex.2'

In reply to Re^2: Regex \. help by AnomalousMonk
in thread Regex \. help by codz67

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