isHex function

bool isHex(
  1. dynamic char
)

Implementation

bool isHex(char) {
  final charCode = char.codeUnitAt(0);
  return (isDigit(char) ||
      (charCode >= 'a'.codeUnitAt(0) && charCode <= 'f'.codeUnitAt(0)) ||
      (charCode >= 'A'.codeUnitAt(0) && charCode <= 'F'.codeUnitAt(0)));
}