Regex to match parts of line and negative-lookup the rest of the line (not match a word)

Question

Is there a regex, that matches
hahafooblababla
and does not match
hahafooblabarbla

Because I am looking for ...foo... and don't want to have ...bar... anywhere after the ...foo...

haha and bla symbolize junk/noise.

UPDATE: At first I tried with

foo.*(?!bar)

--> was not successful

Certainly, you can use a negative lookahead. What is your regex flavor? — Wiktor Stribiżew, Sep 27 '16 at 07:49
I ask what the flavor is because it happens people are tagging their questions with regex-negation and regex-lookarounds tags looking for a RE2 (Google Analytics, eg.) compatible regexps where one cannot use lookarounds. — Wiktor Stribiżew, Sep 27 '16 at 07:56
I would say, that "normal" regex-es - meaning lookarounds are available - are the default in questions. If someone needs a RE2 solution, (s)he should give a hint that this is a special case. — user1414745, Sep 27 '16 at 08:09
BTW I don't get the -1 on my post ... not that I care so much, but was just wondering why :) — user1414745, Sep 27 '16 at 08:11
It is a duplicate of [RegExp exclusion, looking for a word not followed by another](http://stackoverflow.com/questions/10375045/regexp-exclusion-looking-for-a-word-not-followed-by-another). Also, you need to always include what you have tried to the question. — Wiktor Stribiżew, Sep 27 '16 at 08:11

score 0 · Accepted Answer · answered Sep 27 '16 at 07:55

0

foo(?!.*bar)

answered Sep 27 '16 at 07:55

ndnenkov

So, what if the engine is RE2? – Wiktor Stribiżew Sep 27 '16 at 08:01
1

@WiktorStribiżew, according to OP's reaction - it's not. – ndnenkov Sep 27 '16 at 08:04
It's not RE2, I am able to do lookarrounds. Thanks, I was wondering where to put the `.*` part. I tried `foo.*(?!bar)` which didn't work. I didn't realize, that I can use `.*` inside the negative lookahead. – user1414745 Sep 27 '16 at 08:07
@user1414745: Update the question with what you tried. – Wiktor Stribiżew Sep 27 '16 at 08:12

1 Answers1