Ds\Deque::first

Returns the first value in the deque

Description

public mixed Ds\Deque::first()

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)