创建单向链表

/** 创建节点与链表 两种方式创建 头插入与尾插入 **/

function Node(data,next){
    this.data = data;
    this.next = next
}

function NodeList(node){
    this.next = node;
    this.length = 0
}

//头节点插入

function insertNodeHead(num){
    var list = new NodeList(null);
    for(var i = 0;i<num;i++){
        var node = new Node(Math.ceil(Math.random()*100),null)
        node.next = list.next;
        list.next = node;
        list.length++
    }
}

//尾节点插入

function insertNodeTail(num){
    var list = new NodeList(null);
    var temp = list
    for(var i=0;i<num;i++){
        var node = new Node(Math.ceil(Math.random()*100),null)
        temp.next = node
        temp = node
        list.length++
    }
}

// 删除
function delNodeTail(num){
   
}