The Ds\Deque::copy() function is an inbuilt function in PHP which is used to return a copy of the Deque. This will return a shallow copy of the Deque.
Syntax:
public Ds\Deque::copy ( void ) : Ds\Deque
Parameters: This function does not contain any parameter.
Return Value: This function returns a copy of the Deque elements.
Below programs illustrate the Ds\Deque::copy() function in PHP:
Program 1:
<?php   // Declare deque $deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);   echo("Elements in the Deque\n");   // Display the Deque elements var_dump($deck);   // Use copy() function to // copy the Deque $deck_copy = $deck->copy();   echo("\nCopy Deque elements\n");   // Display the Deque elements var_dump($deck_copy);   ?> |
Output:
Elements in the Deque
object(Ds\Deque)#1 (6) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
[4]=>
int(5)
[5]=>
int(6)
}
Copy Deque elements
object(Ds\Deque)#2 (6) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
[4]=>
int(5)
[5]=>
int(6)
}
Program 2:
<?php   // Declare deque $deck = new \Ds\Deque(["neveropen", "for", "neveropen"]);   echo("Elements in the Deque\n");   // Display the Deque elements print_r($deck);   // Use copy() function to // copy the Deque $deck_copy = $deck->copy();   echo("\nCopy Deque elements\n");   // Display the Deque elements print_r($deck_copy);   ?> |
Output:
Elements in the Deque
Ds\Deque Object
(
[0] => neveropen
[1] => for
[2] => neveropen
)
Copy Deque elements
Ds\Deque Object
(
[0] => neveropen
[1] => for
[2] => neveropen
)
Reference: http://php.net/manual/en/ds-deque.copy.php
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
