摘要:
訪问者模式:表示一个作用于某个对象结构中的各元素操作。它使你能够不改变各元素的类的前提下定义作用于这些元素的新操作。 首先定义一个visitor抽象类,为每一个详细类声明一个visit操作 public abstract class Visitor { public abstract void vi 阅读全文
摘要:
题目: Write a function to delete a node (except the tail) in a singly linked list, given only access to that node. Supposed the linked list is 1 -> 2 -> 阅读全文
摘要:
Given a sorted linked list, delete all duplicates such that each element appear only once. For example, Given 1->1->2, return 1->2. Given 1->1->2->3-> 阅读全文