(PECL ds >= 1.0.0)
Ds\Deque::first — Returns the first value in the deque
This function has no parameters.
The first value in the deque.
UnderflowException if empty.
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)