PHP - Função Reduzir () do Vetor Ds

A função Ds \ Vector :: reduce () pode reduzir o vetor a um único valor usando a função de retorno de chamada.

Sintaxe

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

A função Ds \ Vector :: reduce () pode retornar o valor do retorno de chamada final.

Exemplo 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; 
   })); 
?>

Exemplo 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)); 
?>