charCodeBetween method
Implementation
double? charCodeBetween([int start = 0, int? length]) {
length ??= this.length;
if (isNotEmpty) {
String code = '${codeUnitAt(start)}.';
for (int i = start + 1; i < length; i++) {
code += codeUnitAt(i).toString();
}
return double.tryParse(code);
}
return null;
}