Regex for checking that at least 3 of 4 different character groups exist

Question

I\'m trying to write a password validator.

How can I see if my supplied string contains at least 3 different character groups?

It\'s easy enough to check if

Answer 1

This will do all that in one regex

^.*(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[\d\W])(?=.*[!@#\$%&/=?_\.,:;-\\]).*$