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PHP | Ds\Deque join() Function

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The Ds\Deque::join() function is an inbuilt function in PHP which is used to join all values in the Deque as a string. The separator can also be used to join the elements. Syntax:
public Ds\Deque::join( $glue ) : string
Parameters: This function accepts single parameter $glue which holds the separator to separate Deque elements. Return Value: This function returns all values of the Deque joined as a string. Below programs illustrate the Ds\Deque::join() function in PHP: Program 1:
<?php
  
// Declare a deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);
  
echo("Original Deque\n");
  
// Display the Deque elements
print_r($deck);
  
echo("\nString form: ");
  
// Use join() function to joining
// the values in Deque
var_dump($deck->join("|"));
  
?>

                    
Output:
Original Deque
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

String form: string(11) "1|2|3|4|5|6"
Program 2:
<?php
  
// Declare a deque
$deck = new \Ds\Deque(["Geeks", "for", "Geeks"]);
  
echo("Original Deque\n");
  
// Display the Deque elements
print_r($deck);
  
echo("\nString form: ");
  
// Use join() function to joining
// the values in Deque
var_dump($deck->join());
  
?>

                    
Output:
Original Deque
Ds\Deque Object
(
    [0] => Geeks
    [1] => for
    [2] => Geeks
)

String form: string(13) "GeeksforGeeks"
Reference: http://php.net/manual/en/ds-deque.join.php

Last Updated : 14 Aug, 2019
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