🔒 Closed String Shuffler (skips space character)

[Katipunero-]

void main() {
  print("ice cream".shuffled);
}

extension Shuffle on String {
  String get shuffled {
    final letters = split('')
      ..removeWhere((letter) => letter == ' ')
      ..shuffle();

    return replaceAllMapped(
      RegExp(r'[^ ]'),
      (match) =>
          Iterable.generate(match[0]!.length, (_) => letters.removeLast())
              .join(),
    );
  }
}

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