Php/docs/ds-deque.allocate

• PHP Manual
• Deque
• Allocates enough memory for a required capacity

Ds\Deque::allocate

(PECL ds >= 1.0.0)

Ds\Deque::allocate — Allocates enough memory for a required capacity

说明

public Ds\Deque::allocate ( int $capacity ) : void

Ensures that enough memory is allocated for a required capacity. This removes the need to reallocate the internal as values are added.

参数

capacity

The number of values for which capacity should be allocated.

Note:

Capacity will stay the same if this value is less than or equal to the current capacity.

Note:

Capacity will always be rounded up to the nearest power of 2.

返回值

没有返回值。

范例

Example #1 Ds\Deque::allocate() example

<?php$deque = new \Ds\Deque();var_dump($deque->capacity());$deque->allocate(100);var_dump($deque->capacity());?>

以上例程的输出类似于：

int(8)
int(128)