C ා generics - unpacking and type safety, Java generics are syntactic sugar

Now, netcore 3.1 and the latest. Netframework 8 have not been criticized as the ArrayList, but it's a coincidence that this thing has to be said, because it determines that the C ා team changes its ways, abandons the past and starts again, and the last ArrayList case code. public class ArrayList { private object[] items; privat ...

Added by arjuna on Sat, 02 May 2020 20:10:09 +0300

[iOS] prevent users from screenshots

[iOS] prevent users from screenshots Yesterday, the product asked me for new requirements, saying that the boss thought the information in the app was very important, and asked to add restrictions on users' screenshots. At that time, I refused. I told him that this could not be realized. The screenshot of Home+Power was that the system oper ...

Added by AShain on Sat, 02 May 2020 15:07:36 +0300

Summary of JavaScript this

Reference documents: https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/this Due to the lack of front-end in the project team, I sent it from the back-end to the front-end. I started to develop it a week later. The front-end 0 foundation, Alexander. I've been struggling all morning to understand the horror of JavaScr ...

Added by abkdesign on Sat, 02 May 2020 05:47:39 +0300

Using Python to uncover how the melon eaters think of Luo Zhixiang's incident

    Preface Recently, the entertainment industry can be said to be bustling. Before, there was a bully president who loved Xiao San, the palace was torn and forced to be a red girl in the net, and after that, there was a sunny boy named Show Luo, who was robbed of his reputation by Zhou Yangqing. It's hard for ordinary people to understand th ...

Added by r_a_s_robin on Sat, 02 May 2020 03:07:36 +0300

python realizes the wechat automatic reminder function of seckill goods (with code)

Technology realization principle: get the specific commodity information of JD, and then use wechat to send reminders Tool: two microsignals are needed, which are mutual friends If you want to learn Python or are learning python, there are many Python tutorials, but are they up to date? Maybe you have learned something that someone else probabl ...

Added by Pastulio on Mon, 27 Apr 2020 10:54:48 +0300

Hand-on instructions for using Python to grab QQ music data (4th bounce)

[1. Project objectives] By using Python to grab QQ music data (the first shot), we achieve the song name, album name, playback link of a song with a specified number of pages in the QQ music singer's single line. By using Python to grab QQ music data (second round) by hand, we have achieved lyrics and top reviews for specified QQ music songs. B ...

Added by Stoned Gecko on Sun, 26 Apr 2020 20:29:49 +0300

Global exception capture in winform or wpf

In winform or wpf projects, we will inevitably encounter code blocks that forget to catch exceptions. c ා provides us with a mechanism to catch exceptions globally Write this in Program.cs in winform static class Program { [STAThread] static void Main() { Application.SetUnhandledExceptionMode(Unha ...

Added by ftrudeau on Wed, 22 Apr 2020 18:11:03 +0300

Python 0 basic development game, ground mouse (detailed tutorial)

  1, Preparations 1 download and install python2 download and install VS code EditorWhen installing, please check add to path   3 install pygame moduleNote: many people will encounter various problems in the process of learning python, and no one will help answer the questions. For this reason, I have built a python full stack fr ...

Added by beboo002 on Tue, 21 Apr 2020 06:42:53 +0300

Use of log4j

1. Simple use Only one jar package of log4j needs to be imported, and the log4j.properties configuration file under the src directory will be loaded by default 1. Print log to console log4j.properties configuration file content #Set the log level to info and output to the console log4j.rootLogger=info,console log4j.appender.console = org ...

Added by jay_bo on Mon, 20 Apr 2020 18:53:38 +0300

[original] quick start to golang [9.3] - profound slicing skills

Preface What will the following program output? package mainimport "fmt"func f(s []string, level int) {        if level > 5 {               return        }        s = append(s, fmt.Sprint(level))        f(s, level+1)        fmt.Println("level:", level, "slice:", s)}func main() {        f(nil, 0)} Its output is: level: 5 slice: [0 1 2 3 4  ...

Added by tripc1 on Mon, 20 Apr 2020 14:13:45 +0300