PHP - Ds Deque allocate() Function

Ds\Deque::allocate() function can allocate enough memory for a required capacity.

Syntax

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

Ds\Deque::allocate() function ensure that enough memory can be allocated for a required capacity. It can remove the need to reallocate an internal as values are added.

Ds\Deque::allocate() function doesn't return any value.

Example 1

<?php 
   $deque = new \Ds\Deque();  
   var_dump($deque->capacity()); 
   
   $deque->allocate(20);  
   var_dump($deque->capacity()); 
?> 

Example 2

<?php 
   $deque = new \Ds\Deque();  
   var_dump($deque->capacity());  
   
   $deque->allocate(50); 
   var_dump($deque->capacity());  
   
   $deque->allocate(60); 
   var_dump($deque->capacity()); 
?>