elementAtOrNull method

T? elementAtOrNull(
  1. int index

The element at position index of this iterable, or null.

The index is zero based, and must be non-negative.

Returns the result of elementAt(index) if the iterable has at least index + 1 elements, and null otherwise.


T? elementAtOrNull(int index) {
  RangeError.checkNotNegative(index, "index");
  if (this is EfficientLengthIterable) {
    if (index >= length) return null;
    return elementAt(index);
  var iterator = this.iterator;
  do {
    if (!iterator.moveNext()) return null;
  } while (--index >= 0);
  return iterator.current;