Negative Look Behind alternative JAVASCRIPT

Asked Feb 09 '17 at 22:31

Active Feb 09 '17 at 22:31

Viewed 44 times

Hello I'm trying to get my regex working.

Usually I can use a negative look behind to solve my issue, but javascript doesn't allow negative look behind.

I'm trying to match anything with Utility and Not Unit.

(Utility Type) //should match
(Utility Unit) //should not match
(util type) //should match
(utility) //should match

I've got /^(.*util.*)(?<!unit)$/gi working.. But like I mentioned, negative look behind doesn't work in javascript. If you guys can think of another way to this, i'd appreciate the help.

Thanks,

asked Feb 09 '17 at 22:31

caden311

1

Did you bother to search SO first? The question I linked to is the first match of **[javascript] negative lookbehind** – Barmar Feb 09 '17 at 22:33
1

When it comes to negative look behinds, Oasis gave the best advice: don't do it. https://www.youtube.com/watch?v=cmpRLQZkTb8 – Jonathan M Feb 09 '17 at 22:33
1

Lookahead can work but would be a little slower ^(.*util(?:(?!unit$).)*)$ – Feb 09 '17 at 22:39
@sln That was what I needed. Thanks! – caden311 Feb 09 '17 at 22:41
@caden311 - NP .. – Feb 09 '17 at 22:42

Negative Look Behind alternative JAVASCRIPT

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