2023-04-28 04:53:11
Xdebug can greatly improve the efficiency of PHP testing and help you quickly locate the location of bugs. There are a lot of answers online that are outdated, and I configured them according to them,...
2023-04-28 04:49:47
import React from 'react'; export function App(props) { let products = [ { id: '194246', last_name: 'Name1' }, { id: '194246', last_name: 'Name2'...
2023-04-28 04:46:22
Below is not recommended insert ignore into on duplicate key update replace into insert if not exists Better use this one It works in any cases and you don't have to change your data...
2023-04-28 04:42:33
-- -- `post` -- CREATE TABLE `post` ( `id` bigint(20) NOT NULL, `title` text NOT NULL DEFAULT current_timestamp(), `content` longtext NOT NULL, `slug` varchar(64) NOT NULL, `time_...
2023-04-02 01:39:41
What are the database isolation levels, what are their meanings, what is the default isolation level of MYsql, and the advantages and disadvantages of each storage engine Under high concurrency...
2023-04-02 01:35:38
Which kernel parameters have you paid attention to under the Linux system, and tell us what you know. There are several IO models under Linux, and what are the meanings of each. What is the...
2023-04-02 01:34:36
Talk about HashMap, ConcurrentHashMap data structure, the difference between 1.7 and 1.8? Hashmap What will happen if only one writes the other full reads Which Map classes have been used, w...
2023-04-02 01:32:53
Propagation of Spring transactions, focusing on the propagation properties of Spring transactions What are some common annotations? Whether Autowire annotation has been used The implementati...
2023-04-02 01:30:58
The difference between RPC and HTTP, what rpc framework do you know Three-time handshake and four-time wave, describe in detail the difference between TCP3 handshake, TCP and HTTP. The byte int...
2023-04-02 01:28:43
What kind of locks does java have? Have you used reentrantlock? The difference between reentrantlock and syncmchronized Why use a lock? Use a mutex to implement a read-write lock, with prior...