Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have the following regular expression:
/(?<={index:)\d+(?=})/g
I am trying to find index integer in strings like this one:
some text{index:1}{id:2}{value:3}
That expression works fine with php, but it doesn’t work in javascript, I get the following error:
Uncaught SyntaxError: Invalid regular
expression: /(?<={index:)\d+(?=})/:
Invalid group
What do I need to fix?
Thanks.
(?<= )is a positive lookbehind. JavaScript’s flavor of RegEx does not support lookbehinds (but it does support lookaheads).