Re^4: pcre regex

I substituted and changed ^ and $ but still not getting matches

(?<=)\d{4}[A-Z0-9](?=)
[download]

Comment on Re^4: pcre regex Download Code

Replies are listed 'Best First'.
Re^5: pcre regex by moritz (Cardinal) on Apr 06, 2012 at 11:40 UTC
What do you think `(?<=)` and `(?=)` do? Why did you write them? The regex you wrote matches a string like `4444B` within a longer substring, so maybe you're doing something else wrong. Perl 6 - second systems done right	[reply] [d/l] [select]
Re^5: pcre regex by bart (Canon) on Apr 06, 2012 at 12:00 UTC
This might do what yo uwant: `\b\d{4}[A-Z0-9]\b` [download] The \b restricts the matches to word boundaries, so it won't report matches in the middle of a longer "word" (which may include digits), like "123456789ABCD".	[reply] [d/l]