What is a regular expression pattern for rule 'doesn't contain a word W'? [closed]

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I want to test the web-element style: it shouldn't contain words "disabled" or "inactive".

Answer 1

Do you really need a "negative" regex? Why not create a regex that tests that it contains "disabled" or "inactive", and test for it to be false?

'status: inactive' !~ /(disabled|inactive)/

Answer 2

Using negative lookahead:

>> 'status: inactive ' =~ /(?!.*(disabled|inactive))^/
=> nil
>> 'status: disabled' =~ /(?!.*(disabled|inactive))^/
=> nil
>> 'status: enabled' =~ /(?!.*(disabled|inactive))^/
=> 0