Re^3: Recognizing 3 and 4 digit number

my $digits_4 = qr{ (?<![\/-\ \w]) \d{4} (?![\/-\ \w]) }xms;
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untested...

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Re^4: Recognizing 3 and 4 digit number by htmanning (Friar) on Jan 02, 2017 at 03:05 UTC
This one returns the following error: `Invalid [] range "\\/-\\ " in regex; marked by <-- HERE in m/ (?<![\\/ +-\\ <-- HERE \\w]) \\d{4} (?![\\/-\\ \\w]) /` [download] I'm not really sure what is wrong.	[reply] [d/l]
Re^5: Recognizing 3 and 4 digit number by tybalt89 (Monsignor) on Jan 02, 2017 at 03:40 UTC
- should be at beginning or end of []	[reply]