PHP - Ds Vector reduce() Function

Ds\Vector::reduce() function can reduce the vector to a single value using callback function.

Syntax

public mixed Ds\Vector::reduce( callable $callback [, mixed $initial ] )

Ds\Vector::reduce() function can return the value of final callback.

Example 1

<?php 
   $vector = new \Ds\Vector([1, 2, 3, 4, 5]); 
   
   echo("The original vector elements: \n"); 
   print_r($vector); 
   
   echo("\n The element after performing operation: \n"); 
   var_dump($vector->reduce(function($carry, $element) { 
      return $carry + $element + 2; 
   })); 
?>

Example 2

<?php 
   $vector = new \Ds\Vector([10, 20, 30, 40, 50]); 
   
   echo("The original vector elements: \n"); 
   print_r($vector); 
  
   $func = function($carry, $element) { 
      return $carry * $element; 
   }; 
   
   echo("\n The vector after reducing to single element: \n"); 
   var_dump($vect->reduce($func, 10)); 
?>