formatAadhaarCardNumber function

String formatAadhaarCardNumber(
  1. String aadhaarCardNumber
)

Implementation

String formatAadhaarCardNumber(String aadhaarCardNumber) {
  RegExp exp = RegExp(r'(.{4})(?!$)');
  return aadhaarCardNumber.replaceAllMapped(exp, (match) => '${match[0]} ');
}