Title Case a String in Dart

tcase.dart

String titleCase(String input) {
  return input.splitMapJoin(RegExp(r'(\s+|\[|\(|\/)+'),
      onMatch: (m) => '${m[0]}',
      onNonMatch: (word) {
        if (word.length < 2) return word.toUpperCase();

        return word.substring(0, 1).toUpperCase() + word.substring(1);
      });
}