How can I check a string contains at least 6 different digits using regular expressions?

Question

I'm trying to get a regex that checks that a 9 character integer is long and contains at least 6 non-repeating digits

Example:

123456123 ------> Matches (6 different digits)
123243521 ------> Doesn't match (5 different digits)

+3

Avenash 24 Aug 14 at 18:23

1 answer

Lucas Trzesniewski · Accepted Answer · 2014-08-24T18:28:19+0000

It's much easier to do it without regex:

var str = "1234567890";
var isOk = str.Length >= 9
    && str.All(c => c >= '0' && c <= '9')
    && str.Distinct().Count() >= 6;