PHP | Ds\Map allocate() Function

The Ds\Map::allocate() function is an inbuilt function in PHP which is used to allocate enough memory for required capacity.

Syntax:

void public Ds\Map::allocate( $capacity )

Parameters: This function accepts single parameter $capacity which indicate number of capacity allocated.



Return Value: This function does not return any values.

Below programs illustrate the Ds\Map::allocate() function in PHP:

Program 1:

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<?php 
  
// Create new map 
$map = new \Ds\Map(); 
  
// Use capacity() function to 
// display the capacity of map
var_dump($map->capacity()); 
  
// Allocate capacity 
$map->allocate(50); 
  
// Display capacity 
var_dump($map->capacity()); 
  
// Allocate capacity 
$map->allocate(80); 
  
// Display capacity 
var_dump($map->capacity()); 
?> 

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Output:

int(8)
int(64)
int(128)

Program 2:

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<?php 
  
// Create new map 
$map = new \Ds\Map(); 
  
// Declare capacity array 
$arr = array(10, 20, 30, 40); 
  
// Loop run for every array element 
foreach ($arr as $val) { 
      
    // Allocate capacity 
    $map->allocate($val); 
  
    // Display capacity of map
    var_dump($map->capacity()); 
  
?> 

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Output:

int(16)
int(32)
int(32)
int(64)

Reference: https://www.php.net/manual/en/ds-map.allocate.php



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