array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'es', ), 'this' => array ( 0 => 'ds-deque.first.php', 1 => 'Ds\\Deque::first', ), 'up' => array ( 0 => 'class.ds-deque.php', 1 => 'Ds\\Deque', ), 'prev' => array ( 0 => 'ds-deque.find.php', 1 => 'Ds\\Deque::find', ), 'next' => array ( 0 => 'ds-deque.get.php', 1 => 'Ds\\Deque::get', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/ds/ds/deque/first.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PECL ds >= 1.0.0)
Ds\Deque::first — Returns the first value in the deque
Esta función no tiene parámetros.
The first value in the deque.
UnderflowException if empty.
Ejemplo #1 Ds\Deque::first() example
<?php
$deque = new \Ds\Deque([1, 2, 3]);
var_dump($deque->first());
?>
El resultado del ejemplo sería algo similar a:
int(1)