i have those strings
hello,world,1.fin
hello,world,start11.fin
hello,world,start11,then,end22.fin
hello,world,111,then,222,then,end333.fin
hello,world,111,then,222,then,end333threes.fin
hello,world,111,then,222,then,end333threes.fin444
and i need to match the endings numbers only before the . and after world, and i expect to get
1
11
22
333
333
333
i tried this but it does not match the last case ,world,.*?(\d )\. link then i tried this but it only get from begin ,world,.*?(\d ).*\. link
.fin is not static and it does change randomly to .fin444 or .444
CodePudding user response：
You can use
,world,(?:.*\D)?(\d )[^\W\d]*\.
,world,(?:.*\D)?(\d )[^\d.]*\.
See the regex demo.
Details:
,world,- a fixed string(?:.*\D)?- an optional sequence of any zero or more chars other than line break chars as many as possible and then a non-digit char(\d )- Group 1: one or more digits[^\W\d]*(or,[a-zA-Z_]*can also be used, or even[^\d.]*to match any zero or more chars other than digit and a dot) - zero or more word chars excluding digits\.- a.char.
CodePudding user response：
This should work
,world,.*?(\d )[^\d]*\.