Php/docs/ds-deque.first

• PHP Manual
• Deque
• Returns the first value in the deque

Ds\Deque::first

(PECL ds >= 1.0.0)

Ds\Deque::first — Returns the first value in the deque

Description

public Ds\Deque::first ( ) : mixed

Returns the first value in the deque.

Parameters

This function has no parameters.

Return Values

The first value in the deque.

Errors/Exceptions

UnderflowException if empty.

Examples

Example #1 Ds\Deque::first() example

<?php$deque = new \Ds\Deque([1, 2, 3]);var_dump($deque->first());?>

The above example will output something similar to:

int(1)