The Ds\Set::allocate() function is an inbuilt function in PHP which is used to allocate memory for required capacity.
Syntax:
void public Ds\Set::allocate( $capacity )
Parameters: This function accepts single parameter $capacity which holds the value of capacity to be allocated. Capacity always rounded in powers of 2.
Return value: This function does not return any values.
Below programs illustrate the Ds\Set::allocate() function in PHP:
Program 1:
<?php   // Declare new empty set $set = new \Ds\Set();   echo("Allocated Space is: ");   // Use capacity() function var_dump($set->capacity());    // Use allocate() function to // allocate capacity $set->allocate(50);   echo("Allocated space is: ");   // Display the allocated vector // capacity var_dump($set->capacity());   ?> |
Output:
Allocated Space is: int(8) Allocated space is: int(64)
Program 2:
<?php   // Declare an empty set $set = new \Ds\Set();   echo("Allocated Space is: ");   // Use capacity() function var_dump($set->capacity());    // Use allocate() function to // allocate capacity $set->allocate(5);   echo("Allocated space is: ");   // Display the capacity var_dump($set->capacity());   echo("Allocated space is: ");   // Use allocate() function to // allocate capacity $set->allocate(120);   // Display the capacity var_dump($set->capacity()); ?> |
Output:
Allocated Space is: int(8) Allocated space is: int(8) Allocated space is: int(128)
Reference: http://php.net/manual/en/ds-set.allocate.php
