func isEmail() -> Bool {
        let __firstpart = "[A-Z0-9a-z]([A-Z0-9a-z._%+-]{0,30}[A-Z0-9a-z])?"
        let __serverpart = "([A-Z0-9a-z]([A-Z0-9a-z-]{0,30}[A-Z0-9a-z])?\\.){1,5}"
        let __emailRegex = __firstpart + "@" + __serverpart + "[A-Za-z]{2,6}"
        let __emailPredicate = NSPredicate(format: "SELF MATCHES %@", __emailRegex)
        return __emailPredicate.evaluate(with: self)
}

func isPassword() -> Bool {
        let passwordTest = NSPredicate(format: "SELF MATCHES %@", "^(?=.*[A-Za-z])(?=.*[0-9])[A-Za-z-0-9]{6,}$")
        return passwordTest.evaluate(with: self)
}

func isPhone() -> Bool {
        if self.count != 15 {
          return false
        } else {
          return true
        }
    }

    func isName() -> Bool {
        if self.count < 3 {
          return false
        } else {
          return true
        }
    }