separateNumbers3By3 method
Implementation
String separateNumbers3By3() => (this ?? "").replaceAllMapped(RegExp(r"(\d{1,3})(?=(\d{3})+(?!\d))"), (Match m) => "${m[1]},");
String separateNumbers3By3() => (this ?? "").replaceAllMapped(RegExp(r"(\d{1,3})(?=(\d{3})+(?!\d))"), (Match m) => "${m[1]},");