The Ds\Deque::reverse() function is an inbuilt function in PHP which is used to reverse the elements in the Deque in-place.
Syntax:
public Ds\Deque::reverse( void ) : void
Parameters: This function does not accept any parameter.
Return Value: This function does not return any value.
Below programs illustrate the Ds\Deque::reverse() function in PHP:
Program 1:
<?php // Declare a deque $deck = new \Ds\Deque([10, 20, 30, 40, 50, 60]); echo("Elements of Deque\n"); // Display the Deque elements var_dump($deck); // Reversing the deque $deck->reverse(); echo("\nElements of the reversed deque\n"); // Display the Deque elements var_dump($deck); ?> |
Output:
Elements of Deque
object(Ds\Deque)#1 (6) {
[0]=>
int(10)
[1]=>
int(20)
[2]=>
int(30)
[3]=>
int(40)
[4]=>
int(50)
[5]=>
int(60)
}
Elements of the reversed deque
object(Ds\Deque)#1 (6) {
[0]=>
int(60)
[1]=>
int(50)
[2]=>
int(40)
[3]=>
int(30)
[4]=>
int(20)
[5]=>
int(10)
}
Program 2:
<?php // Declare a deque $deck = new \Ds\Deque(["neveropen", "GFG", "ABC"]); echo("Elements of Deque\n"); // Display the Deque elements print_r($deck); // Reversing the deque $deck->reverse(); echo("\nElements of the reversed deque\n"); // Display the Deque elements print_r($deck); ?> |
Output:
Elements of Deque
Ds\Deque Object
(
[0] => neveropen
[1] => GFG
[2] => ABC
)
Elements of the reversed deque
Ds\Deque Object
(
[0] => ABC
[1] => GFG
[2] => neveropen
)
