Reserves enough memory to accommodate a given number of elements

public function reserve(
  int $sz,
): void;

Reserves enough memory for sz elements. If sz is less than or equal to the current capacity of this Set, this method does nothing.


  • int $sz - The pre-determined size you want for the current Set.


  • void


This example reserves space for 1000 elements and then fills the Set with 1000 integers:

const int SET_SIZE = 1000;

function basic_usage_main(): void {
  $s = Set {};

  for ($i = 0; $i < SET_SIZE; $i++) {
    $s[] = $i * 10;