
val 为节点的值
// 节点类class Node(value) {// 实例化时赋值this.val = value// next指针初始为nullthis.next = null}
leetcode题
合并两个链表
/*** @param {ListNode} list1* @param {ListNode} list2* @return {ListNode}*/var mergeTwoLists = function(l1, l2) {if(l1 === null){return l2}else if (l2 === null){return l1}else{if(l1.val < l2.val){l1.next = mergeTwoLists(l1.next,l2)return l1}else{l2.next = mergeTwoLists(l1,l2.next)return l2}}};
