解析PHP标准库SPL数据结构
发布时间：2022-07-21 13:01:09 所属栏目：PHP教程 来源：互联网
导读：?php$obj = new SplQueue();//插入一个节点到top位置$obj-enqueue(1); $obj-enqueue(2); ) ) */$obj-offsetSet(0,C);/** SplQueue Object ( [flags:SplDoublyLinkedList:private] = 4 [dllist:SplDoublyLinkedList:private] = Array ( [0] = C [1] = 2 [2] =
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<?php$obj = new SplQueue();//插入一个节点到top位置$obj->enqueue(1); $obj->enqueue(2); ) ) */$obj->offsetSet(0,'C');/** SplQueue Object ( [flags:SplDoublyLinkedList:private] => 4 [dllist:SplDoublyLinkedList:private] => Array ( [0] => 'C' [1] => 2 [2] => 3 ) ) */$obj->rewind();//从队列中返回并删除bottom位置的元素$obj->dequeue();/** 'C' SplQueue Object ( [flags:SplDoublyLinkedList:private] => 4 [dllist:SplDoublyLinkedList:private] => Array $obj = new SplStack();/** SplStack Object ( [flags:SplDoublyLinkedList:private] => 6 [dllist:SplDoublyLinkedList:private] => Array ( ) ) *///向堆栈放入一个节点到top位置$obj->push(1); $obj->push(2); $obj->push(3);/** SplStack Object ( [flags:SplDoublyLinkedList:private] => 6 [dllist:SplDoublyLinkedList:private] => Array ( [0] => 1 [1] => 2 [2] => 3 ) ) *///堆栈的offset = 0 是Top所在的位置，offset = 1 是top节点靠近bottom位置的相邻节点$obj->offsetSet(0,'C');/** SplStack Object ( [flags:SplDoublyLinkedList:private] => 6 [dllist:SplDoublyLinkedList:private] => Array ( [0] => 1 [1] => 2 [2] => 'C' ) ) */$obj->offsetSet(1,'B');/** SplStack Object ( [flags:SplDoublyLinkedList:private] => 6 [dllist:SplDoublyLinkedList:private] => Array ( [0] => 1 [1] => 'B' [2] => 'C' ) ) *///堆栈的rewind使指针指向top节点，而双向链表的rewind指向bottom节点$obj->rewind();//堆栈的next是使指针向bottom方向相邻的节点移动一位，而链表是向top方向移动$obj->next();//遍历堆栈$obj->rewind();while($obj->valid()){ echo $obj->key().'=>'.$obj->current(); $obj->next(); }/** 2=>'C' 1=>'B' 0=>1 *///从堆栈中取出top位置的节点并删除$obj->pop();复制代码 SplDoublyLinkedList 双向链表类 在这里插入图片描述 $obj = new SplDoublyLinkedList();//SplDoublyLinkedList Object ( [flags:SplDoublyLinkedList:private] => 0 [dllist:SplDoublyLinkedList:private] => Array ( ) )//把新的节点数据添加到链表的顶部Top$obj->push(1); $obj->push(2); $obj->push(3);//把新的节点数据添加到链表底部bottom$obj->unshift(4);/** SplDoublyLinkedList Object （编辑：开发网_开封站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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