PHP | Ds\Sequence allocate() Function

PHP | Ds\Set allocate() Function

Last Updated : 22 Aug, 2019

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

PHP | Ds\Sequence allocate() Function

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