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