kformatDigitPatternEnd method
每隔 x位 加 pattern, 从末尾开始
"0123456789".kformatDigitPatternEnd()} => 01 2345 6789
"0123456789".kformatDigitPatternEnd(digit: 3, pattern: "_") => 0_123_456_789
Implementation
String? kformatDigitPatternEnd({int digit = 4, String pattern = ' '}) {
var file = this;
if (file == null) return null;
String? temp = file.kreverse();
temp = temp.kformatDigitPattern(digit: digit, pattern: pattern);
temp = temp.kreverse();
return temp;
}