getUnsignedVietnamese method
Implementation
String getUnsignedVietnamese(String text) {
const vietnamese = 'aAeEoOuUiIdDyY';
final vietnameseRegex = <RegExp>[
RegExp(r'à|á|ạ|ả|ã|â|ầ|ấ|ậ|ẩ|ẫ|ă|ằ|ắ|ặ|ẳ|ẵ'),
RegExp(r'À|Á|Ạ|Ả|Ã|Â|Ầ|Ấ|Ậ|Ẩ|Ẫ|Ă|Ằ|Ắ|Ặ|Ẳ|Ẵ'),
RegExp(r'è|é|ẹ|ẻ|ẽ|ê|ề|ế|ệ|ể|ễ'),
RegExp(r'È|É|Ẹ|Ẻ|Ẽ|Ê|Ề|Ế|Ệ|Ể|Ễ'),
RegExp(r'ò|ó|ọ|ỏ|õ|ô|ồ|ố|ộ|ổ|ỗ|ơ|ờ|ớ|ợ|ở|ỡ'),
RegExp(r'Ò|Ó|Ọ|Ỏ|Õ|Ô|Ồ|Ố|Ộ|Ổ|Ỗ|Ơ|Ờ|Ớ|Ợ|Ở|Ỡ'),
RegExp(r'ù|ú|ụ|ủ|ũ|ư|ừ|ứ|ự|ử|ữ'),
RegExp(r'Ù|Ú|Ụ|Ủ|Ũ|Ư|Ừ|Ứ|Ự|Ử|Ữ'),
RegExp(r'ì|í|ị|ỉ|ĩ'),
RegExp(r'Ì|Í|Ị|Ỉ|Ĩ'),
RegExp(r'đ'),
RegExp(r'Đ'),
RegExp(r'ỳ|ý|ỵ|ỷ|ỹ'),
RegExp(r'Ỳ|Ý|Ỵ|Ỷ|Ỹ')
];
String result = text;
for (var i = 0; i < vietnamese.length; ++i) {
result = result.replaceAll(vietnameseRegex[i], vietnamese[i]);
}
return result;
}