forEachIndexed method Null safety

void forEachIndexed(
  1. void action(
    1. int index,
    2. T element

Takes an action for each element.

Calls action for each element along with the index in the iteration order.


void forEachIndexed(void Function(int index, T element) action) {
  var index = 0;
  for (var element in this) {
    action(index++, element);