Allocates enough memory for a required capacity

# Ds\Set::allocate

(PECL ds >= 1.0.0)

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

### Description

public Ds\Set::allocate(int `$capacity`): void

Allocates enough memory for a required capacity.

### Parameters

`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.

### Return Values

No value is returned.

### Examples

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

`<?php
$set = new \Ds\Set();
var_dump($set->capacity());
$set->allocate(100);
var_dump($set->capacity());
?>`

The above example will output something similar to:

    int(16)
    int(128)

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