A função Ds \ Deque :: reduce () pode reduzir o deque a um único valor usando uma função de retorno de chamada.
Sintaxe
public mixed Ds\Deque::reduce( callable $callback [, mixed $initial ] )
A função Ds \ Deque :: reduce () pode retornar o valor do retorno de chamada final.
Exemplo 1
<?php
$deque = new \Ds\Deque([10, 20, 30, 40, 50]);
echo("The elements in deque: \n");
print_r($deque);
$func = function($carry, $element) {
return $carry + $element;
};
echo("\n The deque after reduced into single element:");
var_dump($deque->reduce($func, 3));
?>
Exemplo 2
<?php
$deque = new \Ds\Deque([10, 20, 30, 40, 50]);
echo("The elements in deque: \n");
print_r($deque);
$func = function($carry, $element) {
return $carry * $element + 30;
};
echo("\n The deque after reduced into single element:");
var_dump($deque->reduce($func, 10));
?>