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PHP code to implement two-way queue

小云云
小云云Original
2018-03-20 13:35:351467browse

This article shares with you a small piece of code, which is about the code for implementing two-way queue in PHP. I hope it can help you.

<?phpclass Deque {

    private $queue = array();    public function addFirst($item) {
        return array_unshift($this->queue, $item);
    }    public function addLast($item) {
        return array_push($this->queue, $item);
    }    public function removeFirst() {
        return array_shift($this->queue);
    }    public function removeLast() {
        return array_pop($this->queue);
    }

}

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