Created
June 12, 2015 00:33
-
-
Save breeze1990/063f48cf66bf437a4989 to your computer and use it in GitHub Desktop.
JavaScript string replace with subgroups
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // \1 \2... can refer to matched subgroup and be used in regex | |
| // $1 $2... can refer to matched subgroup and be used in newString | |
| // | |
| "abba".replace(/(a)(b)\2\1/g,"$2$2$1$1$1") // =="bbaaa" | |
| // What if I want to insert "$1" literally in newString | |
| // $$ can be used | |
| "abba".replace(/(a)(b)\2\1/g,"$$1$2$1") // =="$1ba" |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment