这期内容当中小编将会给大家带来有关怎么JavaScript中实现一个双向链表,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
原理如下图所示:
示例代码:
/*双向链表
* */
function Node(element) {
this.element = element;
this.next = null;
this.previous = null;//双向链表在这里需要增加一个previous属性
}
function LList() {
this.head = new Node("head");
this.find = find;
this.insert = insert;
this.display = display;
this.remove = remove;
this.findLast = findLast;
this.dispReverse = dispReverse;//将链表反转
}
function dispReverse() {
var currNode = this.head;
currNode = this.findLast();
var nodestr = "";
while (!(currNode.previous == null)) {
nodestr += " "+currNode.element;
currNode = currNode.previous;
}
console.log("将链表反转后: "+nodestr);
}
function findLast() {
var currNode = this.head;
while (!(currNode.next == null)) {
currNode = currNode.next;
}
return currNode;
}
function remove(item) {
var currNode = this.find(item);
if (!(currNode.next == null)) {
currNode.previous.next = currNode.next;
currNode.next.previous = currNode.previous;
currNode.next = null;
currNode.previous = null;
}
}
// findPrevious is no longer needed
/*function findPrevious(item) {
var currNode = this.head;
while (!(currNode.next == null) &&
(currNode.next.element != item)) {
currNode = currNode.next;
}
return currNode;
}*/
function display() {
var currNode = this.head;
var nodestr = "";
while (!(currNode.next == null)) {
nodestr += " "+currNode.next.element;
currNode = currNode.next;
}
console.log(nodestr);
}
function find(item) {
var currNode = this.head;
while (currNode.element != item) {
currNode = currNode.next;
}
return currNode;
}
function insert(newElement, item) {
var newNode = new Node(newElement);
var current = this.find(item);
newNode.next = current.next;
newNode.previous = current;//双向链表在这里需要设置新节点previous属性
current.next = newNode;
}
var cities = new LList();
cities.insert("Conway", "head");
cities.insert("Russellville", "Conway");
cities.insert("Carlisle", "Russellville");
cities.insert("Alma", "Carlisle");
cities.display();//Conway Russellville Carlisle Alma
cities.remove("Carlisle");
cities.display();//Conway Russellville Alma
cities.dispReverse();// Alma Russellville Conway
这里使用在线HTML/CSS/JavaScript代码运行工具:http://tools.jb51.net/code/HtmlJsRun测试上述代码,可得如下运行结果:
上述就是小编为大家分享的怎么JavaScript中实现一个双向链表了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注天达云行业资讯频道。