dart:collection shuffle method    void shuffle(
[Random? random] ) override  Shuffles the elements of this list randomly. final numbers = <int>[1, 2, 3, 4, 5];
numbers.shuffle();
print(numbers); // [1, 3, 4, 5, 2] OR some other random result. Implementation void shuffle([Random? random]) {
  random ??= Random();
  if (random == null) throw "!"; // TODO(38493): The `??=` should promote.

  int length = this.length;
  while (length > 1) {
    int pos = random.nextInt(length);
    length -= 1;
    var tmp = this[length];
    this[length] = this[pos];
    this[pos] = tmp;
  }
}

    
{'path': 'public/docs/dart~2/dart-collection/listmixin/shuffle.html', 'source': 'DevDocs.IO'}