Method isEmailAddress

src/helper.cpp:541–544

	return true;
}
bool Helper::isEmailAddress(const std::string& email) {
	const std::regex pattern ("(\\w+)(\\.|_)?(\\w*)@(\\w+)(\\.(\\w+))+");
	return std::regex_match(email, pattern);
}
bool Helper::isSomeDate(const std::string& dateString) {
	const std::regex pattern ("^\\d+[\\.|\\-|\\|]\\d+[\\.|\\-|\\|]\\d+");
   return std::regex_match(dateString, pattern);