Re: regular expression to match specific members of a bus

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Re^2: regular expression to match specific members of a bus_name by boleary (Scribe) on Feb 12, 2016 at 12:17 UTC
I thought it meant not a digit?	[reply]
Re^3: regular expression to match specific members of a bus_name by AnomalousMonk (Archbishop) on Feb 12, 2016 at 18:29 UTC
What `AnonyMonk` may be getting at is the sometimes tricky difference between `\D` and `(?! \d)`: `\D` requires the presence of a non-digit character, so `'xyz1'` will not match against `/\d\D/`; `(?! \d)` only requires the absence of a digit character, and the end of the string qualifies as this absence so `'xyz1'` will match against `/\d(?!\d)/` — as you have discovered! `c:\@Work\Perl\monks>perl -wMstrict -le "my $s = 'xyz1'; ;; print '/\d \D/ matches' if $s =~ m{ \d \D }xms; print '/\d (?! \d)/ matches' if $s =~ m{ \d (?! \d) }xms; " /\d (?! \d)/ matches` [download] Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]