Help with regex include and exclude

Question

I would like some help with regex.

I\'m trying to create an expression that will include certain strings and exclude certain strings.

For example:

I

Answer 1

To match a string which must have word from a set of words you can use positive lookahead as:

^(?=.*(?:inc1|inc2|...))

To not match a string which has a word from a list of stop words you can use negative lookahead as:

^(?!.*(?:ex1|ex2|...))

You can combine the above two requirements in single regex as:

^(?=.*(?:inc1|inc2|...))(?!.*(?:ex1|ex2|...))REGEX_TO_MATCH_URL$

Rubular link