thousands static method

String thousands(
  1. String integerStr
)

整数增加千位分割符，接收一个整数字符串参数

Implementation

static String thousands(String integerStr) {
  if (integerStr.isEmpty) return '0';
  RegExp regex = RegExp(r'(\d{1,3})(?=(\d{3})+(?!\d))');
  return integerStr.replaceAllMapped(
    regex,
    (Match match) => '${match.group(1)},',
  );
}