Programmer Think

The concept of minimum spanning tree: One edge of a connected graph is a tree The minimum spanning tree is the weight sum of the edges in all spanning trees Often used in the optimization of constructive problems such as network construction Algorithm implementation idea: First, the weighted ed ...

1. Theme color setting   class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, title: 'Flutter Demo',//Available for Android theme: Theme ...

Introduction:Docker is an open source application container engine based on the Go language and compliant with the Apache 2.0 protocol.Docker s can allow developers to package their applications and dependencies into a lightweight, portable container that can then be published to any popular Linux machine, or they can be virtualized.Containers ...

1.Interface Mock The server is turned on, as long as all static resource files such as pictures are placed in thepublicUnder the folder, you can directly access the Mock The server localhost:3000Find the corresponding path http://localhost:3000/images/0/a.jpg(api/public/images/0/a.jpg) http://localhost ...

Reference article:4 installation methods of R packageR language pack related commandssetRepositoriesR install.packages() set domestic CRAN imageTsinghua University open source software image stationR language - default mirror settingsR package installation and setting image It's very difficult for novic ...

I'm the catalog 1, Download Android Studio 2, New Android project 3, What a complete android app needs 1. Be able to access the network 2. Be able to go back, just like App 3. Customize the App icon, not a default Android robot 4. Modify application name 5. Change the color of the main interface to ...

Use of AsynchronousFileChannel class The asynchronusfilechannel class is used to read, write, and manipulate asynchronous channels of files. When you open a file by calling the open() method defined by this class, an asynchronous file channel is created. The file contains a read-write variable length ...

Recently, in the study of GPSD related information, it is found that GPSD can cooperate with NTPD to achieve high-precision time synchronization function, so this topic is involved. At present, Ublox F9P module is in hand, UART outputs NEMA data, and another GPIO outputs 1PPS pulse First, look at a ...

A summary This paper introduces the development interface and usage of WiFi module in the application layer of Android, including some suggestions for dealing with common problems, and finally provides a github project ...

The last blog recorded the basic knowledge of activity. This blog recorded the basic knowledge of Broadcast radio broadcast Broadcast is a mechanism to transfer information between applications. It can transfer information between different programs or within the same program. Broadcast Receiver is used ...