(PECL ds >= 1.0.0)
Ds\Deque::isEmpty — Returns whether the deque is empty
Returns whether the deque is empty.
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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());
?>
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bool(false) bool(true)