create product class package appShop; public class Product { private int id;// productid private String name;// private String description;// private float price;// public Product(int id,String name,String description,float price){ this.
quick way to know Redis6 原子化 redis 是 IO 多路复用模型，即一个线程来处理多个 TCP 连接，这样的好处就是，即使客户端并发请求，也得排队处理，一定程度上解决了多线程模型带的并发问题，所以 redis 是并发安全的？从 redis 本身的架构模式来说，并发是安全的，不存在同时执行两个客户端的命令
出现 mybatis idea 中 updates 返回的数字不为 0， 但数据库没更新 <insert id="insertMoreByList"> insert into t_emp values <foreach collection="emps" item="emp" separator=","> (null, #{emp.
SSO 简直要把我搞死了，关键是这个按钮都找不到，以前用的授权方法失效了，现在就重新撸一遍。其实说真的，如果它教程更清楚点，我申请了 organization 都找不到 SSO 按钮在哪。服了，吐槽。
流程： 1. 清楚 requirement， 需要看到这个系统提供什么功能， clarify use cases and constraints discuss assumptions who (use it) how how many users what does the system do input and out how much data expect to handle how many requests per second expected the expected read to wirte radio 2.
master BST in algo Recover Binary Search Tree 99 Construct Binary Search Tree from Preorder Traversal 1008 Reconstruct Binary Search Tree With Postorder Traversal Reconstruct Binary Search Tree With Level Order Traversal Valid Post-order Traversal Of Binary Search Tree Count of Range Sum 372 Recover Binary Search Tree 99
master BST in algo Maximum Binary Tree 654 Minimum Absolute Difference in BST 530 Closest Binary Search Tree Value 270 Find Mode in Binary Search Tree 501 Lowest Common Ancestor of a Binary Tree 236 Lowest Common Ancestor of a Binary Search Tree delete node in BST Trim a Binary Search Tree Largest Number Smaller In Binary Searc Second Largest In Binary Search Tree Kth Smallest Element in a B Closest Number In Binary Search Tree II Maximum Binary Tree 654
master the 2 pointers in algo [leetcode]https://leetcode.com/list?selectedList=9gt1cpkh this is my 2 point pratice list
Backspace String Compare 844 Squares of a Sorted Array 977 Subarrays with K Different Integers 992 Subarray Product Less Than K 713 Sort Colors 75 Trapping Rain Water Two Sum II - Input Array Is Sorted 167 Backspace String Compare 844
Valid Palindrome 125 Assign Cookies 455 Reverse Only Letters 917 Long Pressed Name 925 Interval List Intersections 986 Exam Room Remove Duplicates from Sorted Array Valid Palindrome 125
