findDigits method

String findDigits(
  1. String text
)

Implementation

String findDigits(String text) {
  final regex = RegExp(r'\b\d{4}\s\d{4}\s\d{4}\s\d{4}\b');
  final matches = regex.allMatches(text);
  final digits = matches.map((match) => match.group(0)!).join('');
  return digits;
}