dart:collection

shuffle method

void shuffle (

1. [Random? random]

)

override

Shuffles the elements of this list randomly.

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;
  }
}