How to match the last occurrence of a pattern using regex

Question

I have a string like

{{token1}}/{{token2}}

I want to match {{token2}} using regex.

other possible cases that it should match are

{{token1}}/{ should match { (the last one).

{{token1}}/{{ should match {{ (the last one).

{{token1}}/{{token2 should match {{token2.

I tried /\S+$/ but it works when the string is {{token1}} {{token2}}.

Thanks in advance.

Can you explain what you mean by "match"?. Do you want to "extract it"? — TheLostMind, Dec 02 '16 at 06:48
@Tushar I have update the question with all possible scenarios — Prashant Agrawal, Dec 02 '16 at 06:56
Does this answer your question? [Find Last Occurrence of Regex Word](https://stackoverflow.com/questions/38490160/find-last-occurrence-of-regex-word) — pilchard, Oct 02 '21 at 12:12

anubhava · Accepted Answer · 2016-12-02T06:59:15.460

4

You can use a negative lookahead regex:

/{+[^}]*}*(?!.*{)/

(?!.*{) is negative lookahead that asserts we don't have any { ahead of the current position.

edited Dec 02 '16 at 06:59

answered Dec 02 '16 at 06:46

anubhava

1

Hey, I have updated the question a bit. Sorry, I wasn't clear enough the first time. – Prashant Agrawal Dec 02 '16 at 06:56

1 Answers1