PHP双向队列
2012-08-12 15:04
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<?php
# 双向队列
class Deque {
public $queue = array();
public function frontAdd($obj) {
array_unshift($this->queue, $obj);
}
public function frontRemove() {
return array_shift($this->queue);
}
public function rearAdd($obj) {
array_push($this->queue, $obj);
}
public function rearRemove() {
return array_pop($this->queue);
}
public function size() {
return count($queue);
}
}
$deque = new Deque();
$deque->rearAdd(2);
$deque->rearAdd(2);
$deque->frontAdd(1);
$deque->frontAdd(1);
$deque->rearAdd(2);
$deque->rearAdd(2);
print_r($deque);
$deque->frontRemove();
$deque->rearRemove();
print_r($deque);
?>Deque Object ( [queue] => Array ( [0] => 1 [1] => 1 [2] => 2 [3] => 2 [4] => 2 [5] => 2 ) ) Deque Object ( [queue] => Array ( [0] => 1 [1] => 2 [2] => 2 [3] => 2 ) )
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