fnPOS function

dynamic fnPOS(
  1. dynamic v1,
  2. dynamic v2
)

Expression function POS(sub,s): Finds a substring's position (byte count).

Implementation

dynamic fnPOS(dynamic v1, dynamic v2) {
  final sub = varToStr(v1);
  final s = varToStr(v2);
  if (sub.isEmpty || s.isEmpty) return 0;
  final i = s.indexOf(sub);
  return i < 0 ? 0 : i + 1;
}