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); ?> |
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 $deck = new \Ds\Deque(["geeks", "for", "geeks"]); echo("Elements in the Deque\n"); // Display the Deque elements print_r($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); ?> |
Elements in the Deque
Ds\Deque Object
(
[0] => geeks
[1] => for
[2] => geeks
)
Copy Deque elements
Ds\Deque Object
(
[0] => geeks
[1] => for
[2] => geeks
)
Reference: http://php.net/manual/en/ds-deque.copy.php
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