Programmer Think

1. Thread synchronization What is thread synchronization? Let's first look at a piece of code of the ticket selling system, and then analyze this problem: package com.test; /** * @decrition Simulated ticket selling thread */ public class Ticket implements Runnable { //Number of votes currently owned private int num = 100; public void ...

reference resources: https://blog.csdn.net/kehyuanyu/article/details/103178926 Hardware circuit: There are two thermistors on the hardware, ADC1 and ADC3 to collect temperature information respectively. ADC3 is used to measure the optical and mechanical temperature. Refer to Murata thermistor NCP15WF104F03RC.pdf for the comparison table of t ...

data According to the document introductionShiro official documents ↑ the link of Shiro document is an official introduction to the quick start. In fact, it will be easier to understand ruoyi's document about the integration of the framework. If according to the structure 1. Security Manager The Subject body represents the ...

Build Echarts from scratch -- v1 ZRender and MVC This chapter begins to enter the main body. Write in front Graphics, elements and graphic elements all refer to XElement, depending on the situation. ts may give a warning. I just want to use the code prompt function, no matter how hot it is. Not all codes are posted in the article, and with the ...

1. Title Description 2. Problem solving ideas Intersection means to have a "global view" of the two arrays. One embodiment of the "global view" in the program is statistics. Therefore, I can use the hash table to count the occurrence times of each element in the two arrays, and then take the small value to build a ne ...

1.A [HNOI2003] laser bomb Link: https://ac.nowcoder.com/acm/contest/999/A Source: niuke.com A new type of laser bomb can destroy all targets in a square with side length R. Now there are n(N ≤ 10000) targets on the map. The integer Xi and Yi (whose value is [05000]) represent the position of the target on the map, and each target has a val ...

Python wechat ordering applet course video https://edu.csdn.net/course/detail/36074 Python actual combat quantitative transaction financial management system https://edu.csdn.net/course/detail/35475 Catalogue* MySQL database installation + Windows - 1. Introduction to main versions - 2. Software download - 3. Introduction to document directo ...

CSS Learning Notes 6 (CSS positioning) CSS positioning location Relative positioning Positioning is to move relative to your previous position in the standard flowFormat: position: relative;Sample program <style> *{ margin: 0; padding: 0; } div{ width: 100px; ...

What is bidirectional bfs? Ordinary bfs traverses downward from one vertex, while bidirectional bfs traverses downward and upward from the two endpoints in turn when the end point is known, until the number of layers overlaps with the previous traversal, the answer comes out. It is clear that a two-way bfs needs to meet a necessary cond ...

Statistical analysis module Demand: count the number of registrants of online education every day, and use the chart to display the number of registrants preparation Code generation and configuration file omission~~ Database tables: statistics_daily, which stores statistical data CREATE TABLE `statistics_daily` ( `id` char(19) NOT NULL C ...