Regular Expressions 101

This regex validates all dates between 1/1/1900 and 12/31/2099, including leap-year dates. It allows either one or two digit month/date values.

Checks that a password has a minimum of 6 characters, at least 1 uppercase letter, 1 lowercase letter, and 1 number with no spaces.

Invalid entries still can be interpreted, e.g. encode(0xAB) => qw== however invalid encoding qx== still can be correctly decoded: ...

This regex validates the year 1200-2299.

This regexp can be used to validate domain names in Golang. While it cannot enforce the 253 character limit (with optional trailing period not included) that can be easily done with a len(domain) <= 253 check. This can be used as-is in other languages, even with RE2 regex engine. Non-capturing grou...