The Ds\Queue::allocate() Function in PHP is used to allocate memory for a Queue class instance. This function allocates sufficient memory for a given capacity for an instance of Queue class.
Syntax:
void public Ds\Queue::allocate ( int $capacity )
Parameters: This function accepts a single parameter $capacity which is an integral value denoting the number of values for which capacity is needed to be allocated.
Return Value: This method does not returns any value.
Below programs illustrate the Ds\Queue::allocate() function in PHP:
Program 1:
<?php // Declare new PriorityQueue $pq = new \Ds\PriorityQueue(); echo("Allocated Space is: "); // Use capacity() function var_dump($pq->capacity()); echo("Allocated space is: "); // Use allocate() function to // allocate capacity $pq->allocate(50); // Display the allocated vector // capacity var_dump($pq->capacity()); ?> |
Output:
Allocated Space is: int(8) Allocated space is: int(64)
Program 2:
<?php // Declare new Queue $q = new \Ds\Queue(); echo("Allocated Space is: "); // Use capacity() function var_dump($q->capacity()); echo("Allocated space is: "); // Use allocate() function to // allocate capacity $q->allocate(5); // Display the allocated vector // capacity var_dump($q->capacity()); // Use allocate() function to // allocate capacity $q->allocate(120); // Display the allocated vector // capacity var_dump($q->capacity()); ?> |
Output:
Allocated Space is: int(8) Allocated space is: int(8) int(128)
