(PECL ds >= 1.0.0)
Ds\Deque::isEmpty — Returns whether the deque is empty
This function has no parameters.
Example #1 Ds\Deque::isEmpty() example
<?php$a = new \Ds\Deque([1, 2, 3]);$b = new \Ds\Deque();var_dump($a->isEmpty());var_dump($b->isEmpty());?>
The above example will output something similar to:
bool(false) bool(true)