PHP | Ds\Deque set() Function

The Ds\Deque::set() function is an inbuilt function in PHP which is used to set the value at the given index in the Deque.

Syntax:

public Ds\Deque::set( $index, $value ) : void

Parameters: This function accept two parameters as mentioned above and described below:

• index: This parameter holds the index value on which the element is to be set.
• value: This parameter holds the value to be set at given index.

Return Value: This function does not return any value.

Below programs illustrate the Ds\Deque::set() function in PHP:

Program 1:

<?php

// Declare a deque
$deck = new \Ds\Deque(["geeks", "for", "geeks", "practice"]);

echo("Elements of Deque\n");

// Display the Deque elements
print_r($deck);

// Updating the deque element at index 2
$deck->set(2, "geeksforgeeks");

echo("Deque after setting value at index 2\n");

// Display the Deque elements
print_r($deck);

?>

Output:

Elements of Deque
Ds\Deque Object
(
    [0] => geeks
    [1] => for
    [2] => geeks
    [3] => practice
)
Deque after setting value at index 2
Ds\Deque Object
(
    [0] => geeks
    [1] => for
    [2] => geeksforgeeks
    [3] => practice
)

Program 2:

<?php

// Declare a deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);

echo("Elements of Deque\n");

// Display the Deque elements
print_r($deck);

// Updating the deque element at index 2
$deck->set(4, 10);

echo("Deque after setting value at index 2\n");

// Display the Deque elements
print_r($deck);

?>

Output:

Elements of Deque
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)
Deque after setting value at index 2
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 10
    [5] => 6
)

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