formatDigitPattern method

String formatDigitPattern({
  1. int digit = 4,
  2. String pattern = ' ',
})

每隔 x位 加 pattern

Implementation

String formatDigitPattern({int digit = 4, String pattern = ' '}) {
  String text = this;
  text = text.replaceAllMapped(
      RegExp('(.{$digit})'), (Match match) => '${match.group(0)}$pattern');
  if (text.endsWith(pattern)) text = text.substring(0, text.length - 1);
  return text;
}