Question

I need to create a regular expression to match strings that satisfy any two of the following three criteria: at least one upper case letter, at lease one lower case letter, at least one number.

for example the following would be the result:

"TestString" = MATCH (upper & lower)
"TestSTring5" = MATCH (upper, lower, & number)
"teststring" = NO MATCH (lower)
"TESTSTRING" = NO MATCH (upper)
"teststring5" = MATCH (lower & number)
"345T" = MATCH (number & upper)

Answer 1

That will be a huge regular expression.

You need to test for something like this (indented for readability only):

"[a-z].*[A-Z]|" +
"[A-Z].*[a-z]|" +
"[A-Z].*[0-9]|" +
"[0-9].*[A-Z]|" +
"[a-z].*[0-9]|" +
"[0-9].*[a-z]"