I am trying to exclude a group of words but include another group of words in a qregexp expression but I am currently having issues figuring this out.
Here are some of the things I tried (this example included all of the words):
(words|I|want|to|include)(?!the|ones|that|should|not|match)
So I tried this (which returned nothing):
^(words|I|want|to|include)(?:(?!the|ones|that|should|not|match).)*$
Am I missing something?
Edit: The reason why I need such an unusual regex (include/exclude) is because I want to search through a series of articles and filter the ones that have the included words in them but not if they also have the excluded words in them.
So for example if article A is:
Lorem ipsum dolor sit amet, consectetur adipiscing elit.
and article B is:
Vivamus fermentum semper porta.
Then a regex that includes lorem would filter article A but not B. But if ipsum is a word that I'm excluding, I do not want article A to be filtered.
I considered doing a regex to filter out the articles with the words that I want and then run a second regex excluding articles from the first set that I do not want, but unfortunately the software I am using does not allow me to do this. I can only run one regular expression.
^(?:(?!\b(?:the|ones|that|should|not|match)\b).)*\b(?:words|I|want|to|include)\b(?:(?!\b(?:the|ones|that|should|not|match)\b).)*$
You need to add lookahead to both parts after you find words whcih should match.See demo.
https://regex101.com/r/bK9wF1/3
or
^(?!.*\b(?:the|ones|that|should|not|match)\b)(?=.*\b(?:words|I|want|to|include)\b).*$
Add both conditions under lookaheads.See demo.