(PECL ds >= 1.0.0)
Ds\Deque::allocate — Allocates enough memory for a required capacity
$capacity): voidEnsures that enough memory is allocated for a required capacity. This removes the need to reallocate the internal as values are added.
capacityThe number of values for which capacity should be allocated.
注意:
Capacity will stay the same if this value is less than or equal to the current capacity.
注意:
Capacity will always be rounded up to the nearest power of 2.
値を返しません。
例1 Ds\Deque::allocate() example
<?php
$deque = new \Ds\Deque();
var_dump($deque->capacity());
$deque->allocate(100);
var_dump($deque->capacity());
?>
上の例の出力は、 たとえば以下のようになります。
int(8) int(128)