(PECL ds >= 1.0.0)
Ds\Deque::isEmpty — Returns whether the deque is empty
Returns whether the deque is empty.
This function has no parameters.
Returns true if the deque is empty, false otherwise.
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)