Javascript - 栈 和 单链表

function Stack() {
    this.dataStore = [];
    this.top = 0;
}

Stack.prototype = {
    length: function () {
        return this.top;
    }, push: function (element) {
        this.dataStore[this.top++] = element;
        return this.top;
    }, pop: function () {
        return this.dataStore[--this.top];
    }, peek: function () {
        return this.dataStore[this.top - 1];
    }, clear: function () {
        return this.top = 0;
    }
};

var stack = new Stack();
console.log("length:" + stack.length());
stack.push("huangjacky");
stack.push("fiend");
console.log("length:" + stack.length());
while (stack.length() > 0) {
    var s = stack.pop();
    console.log("element:" + s);
}
console.log("length:" + stack.length());

function Node(element) {
    this.element = element;
    this.next = null;
}

function LinkList() {
    this.head = new Node("head");
}
LinkList.prototype = {
    insert: function (element, after) {
        var s = new Node(element);
        if (after == undefined) { //如果没有指定after，那么就直接插入到链表的最前面
            s.next = this.head.next;
            this.head.next = s;
            return true;
        } else {
            var node = this.head;
            while (node != null) {
                if (node.element == after) {
                    s.next = node.next;
                    node.next = s;
                    return true;
                }
                node = node.next;
            }
        }
        return false;
    }, remove: function (element) {
        var node = this.head;
        var preNode = null;
        while (node != null) {
            if (node.element == element) {
                preNode.next = node.next;
                return true;
            }
            preNode = node;
            node = node.next;
        }
        return false;
    }, find: function (element) {
        var node = this.head;
        while (node != null) {
            if (node.element == element) {
                break;
            }
            node = node.next;
        }
        return node;
    }, toString: function () {
        var s = "";
        var node = this.head;
        while (node != null) {
            if (node.next == null) {
                s += node.element;
            } else {
                s += node.element + " --> ";
            }
            node = node.next;
        }
        return s;
    }
};
var l = new LinkList();
l.insert("huangjacky");
l.insert("fiend", "huangjacky");
l.insert("jackyhuang", "fiend");
l.insert("abc");
var s = l.find("huangjacky");
if (s) {
    console.log("next to huangjacky is :" + s.next.element);
}
l.remove("fiend");
console.log("linklist is :" + l.toString());