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PHP Ds / Deque rotate () function

Syntax:
public DsDeque::rotate ($rotations): void
Parameters: This function takes one parameter, $rotations, which contains the number of rotations of elements in the Deque to be rotated.Return Value:this function is not returns no value.The following programs illustrate the Ds / Deque::rotate()function in PHP:Program 1:  
// Declare deque $deck = new DsDeque ([1, 2, 3, 4, 5, 6]); echo ( " Elements of Deque " );  
// Show Deque elements print_r ( $deck );  
// rotate the deck 2 positions $deck -> rotate (2); echo ( " Rotated Deque " );  
// Show Deque elements print_r ( $deck );  
?>
Exit:
Elements of Deque DsDeque Object ([0] = > 1 [1] = > 2 [2] = > 3 [3] = > 4 [4] = > 5 [5] = > 6) Rotated Deque DsDeque Object ([0] = > 3 [1] = > 4 [2] = > 5 [3] = > 6 [4] = > 1 [5] = > 2)
Program 2:  
// Declare deque $deck = new DsDeque ([ "engineer" , "for" , " engineer " , " practice " ]); echo ( " Elements of Deque " );  
// Show Deque elements print_r ( $deck );  
// rotate the deck 2 positions $deck -> rotate (2); echo ( " Rotated Deque " );  
// Show Deque elements print_r ( $deck );  
?>
Exit:
Elements of Deque DsDeque Object ([0] = > engineer [1] = > for [2] = > engineer [3] = > practice) Rotated Deque DsDeque Object ([0] = > engineer [1] = > practice [2] = > engineer [3] = > for)
Link: http://php.net/manual/en/ds-deque.rotate.php

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