Top "Lookahead" questions

Regular expression lookarounds are zero-width assertions that verify conditions about the context of a match at the current match position.

How to use regex lookahead to limit the total length of input string

I have this regular expression and want to add the rule which limit the total length is no more than 15 …

regex expression limit lookahead
REGEX - Matching any character which repeats n times

How to match any character which repeats n times? Example: for input: abcdbcdcdd for n=1: .......... for n=2: ......... for n=3: .. ..... for …

regex repeat lookahead