localizeDigits method

String localizeDigits({ String fromZeroDigit = '0', required String toZeroDigit, })

Zero digits in some languages:

Language	Zero Digit	Unicode
Marathi	०	\u0966
Bengali	০	\u09e6
Kannada	೦	\u0ce6
Arabic	٠	\u0660
Persian	۰	\u06f0

References:

• https://github.com/dart-lang/i18n/blob/main/pkgs/intl/lib/date_symbol_data_local.dart
• https://github.com/flutter/flutter/blob/master/packages/flutter_localizations/lib/src/l10n/generated_date_localizations.dart
• https://github.com/dart-lang/i18n/blob/main/pkgs/intl/lib/number_symbols_data.dart

Implementation

String localizeDigits({
  String fromZeroDigit = '0',
  required String toZeroDigit,
}) {
  assert(fromZeroDigit.length == 1);
  assert(toZeroDigit.length == 1);
  final localizedString = StringBuffer();
  for (int i = 0; i < length; i++) {
    final String char = this[i];
    if (char.codeUnitAt(0) >= fromZeroDigit.codeUnitAt(0) &&
        char.codeUnitAt(0) <= fromZeroDigit.codeUnitAt(0) + 9) {
      int digit = char.codeUnitAt(0) - fromZeroDigit.codeUnitAt(0);
      localizedString.writeCharCode(toZeroDigit.codeUnitAt(0) + digit);
    } else {
      localizedString.write(char);
    }
  }
  return localizedString.toString();
}