Ds\Deque::first
Returns the first value in the deque
Description
public mixed Ds\Deque::first()
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: