PHP | Ds\Deque::apply() Function

PHP Ds\Deque::apply() Function


Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP Ds Deque apply() Function.

PHP Ds Deque apply() function can update all values by applying a callback function to each value.

PHP Ds\Deque::apply() function can update all values by applying a callback function to each value in the deque.

Syntax

Following below is the syntax to use this function -

public void Ds\Deque::apply( callable $callback )


Return Value

This built-in PHP function does not return any value.

Example1

Try out the below example -

<?php 
   $deque = new \Ds\Deque([1, 2, 3, 4, 5, 6]); 
   echo("\n The elements in the deque: \n"); 
   print_r($deque);  
   
   $deque->apply(function($element) {  
      return $element * 10;  
   });  
   echo("\n The updated elements in the deque: \n"); 
   print_r($deque); 
?>

Example2

Try the following example -

<?php 
   $deque = new \Ds\Deque([10, 20, 30, 40, 50, 60]);  
   echo("\n The elements in the deque: \n"); 
   print_r($deque); 
   
   $deque->apply(function($element) {  
      return $element % 10;  
   }); 
   echo("\n The updated elements in the deque: \n"); 
   print_r($deque); 
?> 


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the Ds Deque capacity() Function in PHP.

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