Programmer Group

Spring Boot starter We know that Spring Boot greatly simplifies the initial construction and development process of the project, which are completed through the starter provided by Spring Boot. Pinda general permission system is developed based on Spring Boot, and some basic modules are starters in essence, so we need to have a comprehensive a ...

Learning objectives Understand the role and usage scenario of update notifierApplication scenario: Check whether npm packages are updated, such as component library updates or other npm package updates, Data preparation Link: https://github.com/yeoman/update-notifier What is an update notifier Prompt package needs to be updated The ess ...

1. Problem description I saw a blank question from my colleagues in the group two days ago. The general phenomenon is as follows: mysql> select @@version; +-----------+ | @@version | +-----------+ | 8.0.25 | +-----------+ 1 row in set (0.00 sec) mysql> create table t1( -> c1 int, -> c2 varchar(4) check(c2<>'') # ...

java foundation - Inner Class 1.1 non static internal class    defining an internal class is very simple. Just put one class inside another. The "class interior" here includes any position in the class. Internal classes can be defined even in methods (the internal classes defined in methods are called local internal classe ...

https://duanqz.github.io/2015-10-12-ANR-Analysis 1. Overview ANR(Application Not Responding) is a simple definition, but it covers many design ideas of Android system. Firstly, ANR belongs to the category of application, which is different from SNR (system not responding). The problem reflected by SNR is that the system_server has lost its re ...

1, Foreword I've seen the interview questions of Holy Grail layout and double wing layout many times. Each time I thought I understood it. As a result, I didn't see it for a while or forgot it. Maybe the interview level I experienced was too low to get it.. In addition, there are generally no such optimization requirements in normal developmen ...

Basic concepts and terms Data is the symbolic representation of objective things;Data element is the basic unit of data;Data item is the smallest indivisible unit of data. A data element can be composed of several data items;A data object is a collection of data elements with the same properties and a subset of data;A data structure is a colle ...

Problem description Question No.:202012-2Test title:Optimal threshold of period end forecasttime limit:1.0sMemory limit:512.0MBProblem Description: Topic background Considering that the safety index is an integer in a large range and the side dishes are likely to be confused about whether they are really safe, Dunton decided to set a threshold ...

I run the tool Xshell 1, Install pagoda panel Skip directly installed yum install -y wget && wget -O install.sh http://download.bt.cn/install/install_6.0.sh && sh install.sh 6dca892c Enter the command in the Xshell 6 command window and press enter. The installation will be successful in 10 minutes     Note ...

Linux interrupt Using interrupts in IM6ULL bare metal requires a lot of work, such as configuring registers, enabling IRQ and so on. The Linux kernel provides a perfect interrupt framework. We only need to apply for interrupts and register interrupt processing functions. It is very convenient to use and does not need a series of complex regist ...