PHP Ds\Set reverse() Function

The Ds\Set::reverse() function of Ds\Set class in PHP is an inbuilt function which is used to reverse the order of elements present in the Set instance. This function reverses the Set in-place. That is, it does not uses any extra space and updates the original Set instance with reversed values. Syntax:

void public Ds\Set::reverse ( void ) 

Parameters: This function does not accepts any parameters. Return Value: This function does not returns any value. It reverses the order of elements in the actual Set instance. Below programs illustrate the Ds\Set::reverse() function: Program 1: php

<?php 

// Declare new Set
$set = new \Ds\Set(["10", "20", "30"]); 

// Display the initial Set element 
echo "Initial Set: \n";
var_dump($set); 

// Reverse the set
$set->reverse();

// Print the reversed Set
echo "\nReversed Set is: \n";
var_dump($set);

?> 

Program 2: php

<?php 

// Declare new Set
$set = new \Ds\Set(["Geeks", "for", "Keegs"]); 

// Display the initial Set element 
echo "Initial Set: \n";
var_dump($set); 

// Reverse the set
$set->reverse();

// Print the reversed Set
echo "\nReversed Set is: \n";
var_dump($set);

?> 

Reference: http://php.net/manual/en/ds-set.reverse.php