Regex matching line not containing the string

Question

I'd like to select a lines with does not contain a word SCREEN. I tried the following regex (?<!SCREEN).+ but it seems not to work - selects all the lines. Why doesn't it work?

The .+ will match anything (that is at least 1 character long), so it effectively cancels your negative lookbehind. Check this solution out:https://stackoverflow.com/questions/406230/regular-expression-to-match-a-line-that-doesnt-contain-a-word — whatever, Dec 21 '17 at 12:48

score 48 · Answer 1 · answered Dec 21 '17 at 14:05

48

The short answer: ^((?!SCREEN).)*$

This is inspired by https://stackoverflow.com/questions/406230/regular-expression-to-match-a-line-that-doesnt-contain-a-word which contains a full explanation

answered Dec 21 '17 at 14:05

vera

1,270

4

I think ^(?:(?!SCREEN).)*$ would be more efficient – LorneCash Feb 07 '21 at 22:09

score -3 · Answer 2 · answered Jun 14 '19 at 04:30

-3

Another try for this case: (SCREEN){0}.*$

Hope that can help.

answered Jun 14 '19 at 04:30

TraXanh

19

7

This still matches lines with "SCREEN" too. https://regex101.com/r/CyaPYl/1 – Máté Juhász Jun 14 '19 at 04:40

Regex matching line not containing the string

2 Answers2