La clase SplStack

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

Introducción

La clase SplStack proporciona la funcionalidad principal de una pila implementada mediante una lista doblemente enlazada estableciendo el modo iterador a SplDoublyLinkedList::IT_MODE_LIFO .

Sinopsis de la clase

class SplStack extends SplDoublyLinkedList {

/* Constantes heredadas */

public const int SplDoublyLinkedList::IT_MODE_LIFO ;

public const int SplDoublyLinkedList::IT_MODE_FIFO ;

public const int SplDoublyLinkedList::IT_MODE_DELETE ;

public const int SplDoublyLinkedList::IT_MODE_KEEP ;

/* Métodos heredados */

public function SplDoublyLinkedList::add (int $index, mixed $value): void

public function SplDoublyLinkedList::bottom (): mixed

public function SplDoublyLinkedList::count (): int

public function SplDoublyLinkedList::current (): mixed

public function SplDoublyLinkedList::getIteratorMode (): int

public function SplDoublyLinkedList::isEmpty (): bool

public function SplDoublyLinkedList::key (): int

public function SplDoublyLinkedList::next (): void

public function SplDoublyLinkedList::offsetExists (int $index): bool

public function SplDoublyLinkedList::offsetGet (int $index): mixed

public function SplDoublyLinkedList::offsetSet (? int $index, mixed $value): void

public function SplDoublyLinkedList::offsetUnset (int $index): void

public function SplDoublyLinkedList::pop (): mixed

public function SplDoublyLinkedList::prev (): void

public function SplDoublyLinkedList::push (mixed $value): void

public function SplDoublyLinkedList::rewind (): void

public function SplDoublyLinkedList::serialize (): string

public function SplDoublyLinkedList::setIteratorMode (int $mode): int

public function SplDoublyLinkedList::shift (): mixed

public function SplDoublyLinkedList::top (): mixed

public function SplDoublyLinkedList::unserialize (string $data): void

public function SplDoublyLinkedList::unshift (mixed $value): void

public function SplDoublyLinkedList::valid (): bool

}

Ejemplos

Ejemplo #1 Ejemplo de SplStack

<?php
$q = new SplStack();
$q[] = 1;
$q[] = 2;
$q[] = 3;
foreach ($q as $elem) {
 echo $elem."\n";
}
?>

El ejemplo anterior mostrará:

3
2
1

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User Contributed Notes 2 notes

down

lsroudi at gmail dot com ¶

12 years ago

the SplStack is simply a SplDoublyLinkedList with an iteration mode IT_MODE_LIFO and IT_MODE_KEEP

down

lincoln dot du dot j at gmail dot com ¶

9 years ago

<?php
//SplStack Mode is LIFO (Last In First Out)
 
$q = new SplStack();
$q[] = 1;
$q[] = 2;
$q[] = 3;
$q->push(4);
$q->add(4,5);
$q->rewind();
while($q->valid()){
 echo $q->current(),"\n";
 $q->next();
}
?>

Output
5
4
3
2
1

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