Regular expression to detect numbers repeating in a row

Question

I cant realize and find a regular expression to detect sequences of repeated numbers (more than 2 times) like:

1111 or
a1111 or
test4555

Someone can help me please?

Might want to start here: http://stackoverflow.com/questions/6507982/regex-to-find-repeating-numbers — David Zemens, Feb 15 '13 at 17:50
It's silly to do this with a regular expression. Just scan the string looking for repeated digits. — NovaDenizen, Feb 15 '13 at 17:50
@NovaDenizen: Really?? I think this is actually a perfect situation that's calling for a regex. — ruakh, Feb 15 '13 at 17:52

score 11 · Accepted Answer · answered Feb 15 '13 at 17:51

11

You can write:

/(\d)\1\1/

where \d means "a digit", (...) means "capture (remember) what ... matched", and \1 means "what the first (...) captured".

answered Feb 15 '13 at 17:51

ruakh

1 Answers1