Shuffle - Hhvm — ContextQMD

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Shuffles the values of the current Vector randomly in place

Hack

public function shuffle(): void;

Returns

void

Examples

basic-usage.hack

$v = Vector {'red', 'green', 'blue', 'yellow'};

// Randomize the Vector elements in place
$v->shuffle();

\var_dump($v);
```.hhvm.expectf
object(HH\Vector) (4) {
  [0]=>
  string(%d) "%s"
  [1]=>
  string(%d) "%s"
  [2]=>
  string(%d) "%s"
  [3]=>
  string(%d) "%s"
}
```.example.hhvm.out
object(HH\Vector) (4) {
  [0]=>
  string(4) "blue"
  [1]=>
  string(5) "green"
  [2]=>
  string(6) "yellow"
  [3]=>
  string(3) "red"
}