The Ds\Deque::find() function is an inbuilt function in PHP which is used to find the index of the element in the Deque if element found in the Deque.
Syntax:
public Ds\Deque::find( $value ) : mixed
Parameters: This function accepts single parameter $value which holds the element whose index is to be found.
Return Value: This function returns the index of the element if element exist, else returns false.
Below programs illustrate the Ds\Deque::find() function in PHP:
Program 1:
PHP
<?php// Declare a deque$deck = new \Ds\Deque([10, 20, 3, 40, 50, 6]);echo("Elements in the Deque\n");// Display the Deque elementsprint_r($deck);echo("\nIndex of 3 in the deque: ");// Use find() function to find // the index of elementprint_r($deck->find(3));?> |
Output:
Elements in the Deque Ds\Deque Object ( [0] => 10 [1] => 20 [2] => 3 [3] => 40 [4] => 50 [5] => 6 ) Index of 3 in the deque: 2
Program 2:
PHP
<?php// Declare a deque$deck = new \Ds\Deque(["Geeks", "for", "GFG"]);echo("Elements in the Deque\n");// Display the Deque elementsprint_r($deck);echo("\nIndex of 3 in the deque: ");// Use find() function to find // the index of elementvar_dump($deck->find("ABC"));?> |
Output:
Elements in the Deque Ds\Deque Object ( [0] => Geeks [1] => for [2] => GFG ) Index of 3 in the deque: bool(false)
Reference: http://php.net/manual/en/ds-deque.find.php
