CODEWITHSUNDEEP
regexregex-negation
Mike
Mike

Reputation: 115

Regex "All that don't contain this string"

I am not at all familiar with, nor have I ever had to really use regex before. I'm using some software that requires regex for "advanced filters" and I've spent the better part of 2 hours researching & trying to get this to work... I've found other posts that seem similar, but for the life of me, I cannot adapt those answers to my specific need.

Requirement: Return all results which DO NOT contain a permutation of:

ListView
List View
Listview
List view
listview
list view
listView
list View

...but would need to match anything else with more than 0 characters. I've gotten the following to work in the positive case (e.g. it successfully matches the strings above. Now I just need to negate it.

[Ll]ist[\s]?[Vv]iew

Intuitively, this seems like it should be easy... Things I've tried:

(?![Ll]ist[\s]?[Vv]iew)
(?!([Ll]ist[\s]?[Vv]iew))
(?:(?!([Ll]ist[\s]?[Vv]iew)))

Upvotes: 1

Views: 58

Answers (1)

Tim Biegeleisen
Tim Biegeleisen

Reputation: 522007

Here is one pattern which seems to work:

^(?!.*\b[Ll]ist[ ]?[Vv]iew\b).*$

Demo

It uses a negative lookahead to assert that no permutation of list + view occurs. You were on the right track, but the general pattern to assert that some word WORD does not occur anywhere is this:

^(?!.*\bWORD\b)

The .* allows for WORD to occur anywhere.

Note that if you regex tool has a case insensitive mode, then the pattern can be simplified to this:

^(?!.*\blist[ ]?view\b).*$

Upvotes: 1

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