regex : minimum total number of digits in a string

Question

I'm trying to know how many digits there is in a string that is essentially like a password.

For now I have this regex :

^(?=.*[0-9]{3,})([a-zA-Z0-9_/+*.-]{6,})$

It works great when their is 3 digits in a row but not when they are separated in the whole string.

I need to be able to know if there is 3 digit in strings like those :

h123dasd 1hkh/23jd 1gvbn/*2fefse-

What can I do ?

Have a look at [this question](http://stackoverflow.com/questions/15341016/regex-to-check-for-at-least-3-characters). — Wiktor Stribiżew, Apr 21 '16 at 07:35

score 3 · Accepted Answer · answered Apr 21 '16 at 07:35

3

You can use this regex:

/^(?=(?:\D*\d){3,})[a-zA-Z0-9_/+*.-]{6,}$/

This will enforce 3 digits in your input that may or may not be consecutive.

answered Apr 21 '16 at 07:35

anubhava

score 1 · Answer 2 · answered Apr 21 '16 at 07:44

1

No need for such a complicated regex IMO - just extract digits from the string, concat the matches, and then check the length. Something like:

str.match(/\d+/g).reduce((p, c) => p + c).length > 3;

answered Apr 21 '16 at 07:44

Andy

2 Answers2