extension RegexExt on String {
  bool validateEmail() => RegExp(
          r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+")
      .hasMatch(this);

  bool validatePhoneNumber() => length == 11;
}