JavaScript数据结构-8.双向链表

 1 <!DOCTYPE html>
 2 <html>
 3     <head>
 4         <meta charset="UTF-8">
 5         <title>双向链表</title>
 6     </head>
 7     <body>
 8         <script>
 9             function Node(ele){
10                 this.ele = ele;
11                 this.prev = this.next = null;
12             }
13             
14             function linkList(){
15                 this.head = new Node("head");
16                 this.find = find;
17                 this.insert = insert;
18                 this.findLast = findLast;
19                 this.display = display;
20                 this.disReverse = disReverse;
21                 this.remove = remove;
22                 
23             }
24             function find(item){
25                 var currNode = this.head;
26                 while (currNode.ele != item){
27                     currNode = currNode.next;
28                 }
29                 return currNode;
30             }
31             function insert(newEle,item){
32                 var newNode = new Node(newEle);
33                 var current = this.find(item);
34                 newNode.next = current.next;
35                 newNode.prev = current;
36                 current.next = newNode;
37             }
38             
39             function display(){
40                 var currNode = this.head;
41                 while(currNode.next != null){
42                     console.log(currNode.next.ele);
43                     currNode = currNode.next;
44                 }
45                 return currNode;
46             }
47             
48             function findLast(){
49                 var currNode = this.head;
50                 while(currNode.next != null){
51                     currNode = currNode.next;
52                 }
53                 return currNode;
54             }
55             
56             function remove(item){
57                 var currNode = this.find(item);
58                 if(currNode.next != null){
59                     currNode.prev.next =currNode.next;
60                     currNode.next.prev = currNode.prev;
61                     currNode.next = null;
62                     currNode.prev = null;
63                 }
64             }
65             
66             function disReverse(){
67                 var currNode = this.findLast();
68                 while(currNode.prev != null ){
69                     console.log(currNode.ele);
70                     currNode = currNode.prev;
71                 }
72             }
73             
74             
75             //测试
76             var obj = new linkList();
77             obj.insert("zhangsan","head");
78             obj.insert("lisi","zhangsan");
79             obj.insert("zhaowu","lisi");
80             obj.insert("wangliu","zhaowu");
81               console.log(obj.findLast());
82               obj.display();
83               obj.disReverse();
84               obj.remove("lisi");
85               obj.display();
86         </script>
87     </body>
88 </html>