https://dartpad.dartlang.org/31606b48969a61ba3856fb0fa0620760

dynamic.dart

void main() {
  for (int i = 0; i < 5; i++) {
    print('hello ${i + 1}');
  }
  
  for (var i in ["1", false]) {
    print(convertToBool(i));
  }
}

bool convertToBool(dynamic arg) {
  print(arg.runtimeType);
  if (arg is bool) return arg;
  if (arg is String) return arg == 'true';
  // dynamic is like `NSObject`??
  return arg == 1;
  // info: dead code
  // -> checking control flow??
  throw new ArgumentError('Cannot convert $arg to a bool.');
}


// bool convertToBool(int arg) {
//   print(arg.runtimeType);
//   return true;
// }


// bool convertToBool(String arg) {
//   print(arg.runtimeType);
//   return false;
// }