xiaoyongyong

摘要： mocket 中常用操作的代码和注解对等操作 相关对等操作 code anotation note @Beforepublic void init() {MockitoAnnotations.initMocks(this);} @RunWith(MockitoJUnitRunner.class)pu 阅读全文

摘要： 292. Nim Game You are playing the following Nim Game with your friend: Initially, there is a heap of stones on the table. You and your friend will alt 阅读全文

摘要： 55. Jump Game Medium You are given an integer array nums. You are initially positioned at the array's first index, and each element in the array repre 阅读全文

摘要： redis 安装： brew install redis 启动redis： /usr/local/opt/redis/bin/redis-server /usr/local/etc/redis.conf 进入redis： redis-cli String 127.0.0.1:6379> 127.0. 阅读全文

摘要： 1.简单的加减问题，比如：1+2-3=0 1+2-3 可以看作 +1+2-3 ， 那么我们可以逐个把这些数字放到stack，最后加起来 class Solution { public int calculate(String s) { Stack<Integer> stack = new Stack 阅读全文

摘要： 203. Remove Linked List Elements Easy Given the head of a linked list and an integer val, remove all the nodes of the linked list that has Node.val == 阅读全文

摘要： 206. Reverse Linked List Easy 9329166Add to ListShare Given the head of a singly linked list, reverse the list, and return the reversed list. Example 阅读全文

摘要： 206. Reverse Linked List Easy Given the head of a singly linked list, reverse the list, and return the reversed list. Example 1: Input: head = [1,2,3, 阅读全文

摘要： 1254. Number of Closed Islands Medium Given a 2D grid consists of 0s (land) and 1s (water). An island is a maximal 4-directionally connected group of  阅读全文

摘要： 547. Number of Provinces Medium There are n cities. Some of them are connected, while some are not. If city a is connected directly with city b, and c 阅读全文