Question on regex

[Felix Benner]

Prabhu Gurumurthy schrieb:

> to fix this problem, i used negative lookahead with ip pattern:
> so the ip pattern now changes to:
> \d{1,3}(\.\d{1,3}){3}(?!/\d+)
> 
> now the problem is  10.150.100.0 works fine, 10.100.4.64 subnet gets
> matched with ip pattern with the following result:
> 
> 10.100.4.6
> 
> Is there a workaround for this or what should change in ip regex pattern.
> 

I think what you want is that neither /d+ nor another digit nor a . follows:
\d{1,3}(\.\d{1,3}){3}(?!(/\d)|\d|\.)
This way 10.0.0.1234 won't be recognized as ip. Neither will 23.12.
which could be a problem if an ip is at the end of a sentence, so you
might want to omit that.