A regular expression to match repeating digits in a given number. Can be used to check if a number or string has duplicated digits.
/([0-9])\1+/g
Matches:
- 12333
- 111111
- abc111def
Non-matches:
- 123123
- aaa
- abc123abc
See Also:
- Regex To Match Characters Repeated More Than A Specified Number Of Times
- Regex To Match Consecutive Occurrences Of The Same Character In A String