Programmer Group

  Due to the recent delay of professional courses and various things, I'm sorry for the late update, but it came today. Here is the last section of getting to know the C plate. The subsequent updates will be more specific and detailed 😋 1. Common keywords auto  break   case  char  const   continue  default  do   double else  enum   ...

brief introduction curl is a common command-line tool for requesting Web servers. Its name means the URL tool of the client. Its function is very powerful, with dozens of command line parameters. If you are proficient, you can completely replace graphical interface tools such as Postman. This paper introduces its main command line paramete ...

catalogue preface 1, Concept of right value reference         1.1 concept of left value and right value         1.2 comparison between reference and right value reference 2, Role of R-value reference         2.1 referenced defects         2.1 mobile seman ...

Maintaining code is one of the most important daily tasks for programmers. Have you ever encountered the following problems? When I took over the maintenance project, I found that the document was missing and the code was not annotated. In addition, the maintainer resigned, so I can only sort out the code logic by guessing. The code s ...

1, Foreword Recently, the company's project is ready to start reconstruction. The framework is selected as SpringBoot+Mybatis. This article mainly records the process of building a SpringBoot multi module project in IDEA. 1. Development tools and system environment IDE: IntelliJ IDEA 2018.2 System environment: mac OSX 2. Project directory st ...

I. overview of RedisTemplate 1.Redis Redis is an open source key value database, which runs in memory and is written in C language. Redis is usually used for enterprise development to implement caching. Similar products include Memcache. Memcached, etc. 2.Jedis Jedis is a Java oriented client officially launched by Redis, which provides man ...

catalogue Introduction text 1, Introduction 2, The stars and the sea are you 1) Part 1 confession 2) Part 2 confession 3) Part 3 confession 4) Part 4 confession 5) Part 5 confession 6) Part 6 confession summary Complete free source code collection: Some previous Tuttle articles recommend: Article summary—— Introducti ...

Chapter 56 SQL command INSERT OR UPDATE Add a new row to the table or update an existing row in the table. outline INSERT OR UPDATE [%keyword] [INTO] table SET column = scalar-expression {,column2 = scalar-expression2} ... | [ (column{,column2} ...) ] VALUES (scalar-expression {,scalar-expression2} ...) | ...

I learned BroadcastReceiver from my teacher today. Let's record it. Send standard broadcast (use static registration, that is, manually write the registration code in AndroidManifest.xml) Take a look at my project structure   The MainActivity code is as follows import android.content.ComponentName; import android.conten ...

1, Multiple linear regression The changes of socio-economic phenomena are often affected by multiple factors. Therefore, multiple regression analysis is generally required. We call the regression including two or more independent variables as multiple linear regression. The basic principle and calculation process of multiple linear regr ...