Programmer Group

Some time ago, a group of friends asked a go language question in the group: The main function of main.go calls the hello() function of demo.go. The main.go and hello.go belong to the main package. However, executing go run main.go in the directory of main.go will report that the Hello function is undefined: The code structure is as follows: * ...

I. Preface In many installation packages, in the installation process, we can often see a beautiful progress bar at the bottom, which is suspended to display the corresponding progress, and then the bottom progress is displayed in a variety of color gradients. The progress bar provided by Qt or the progress bar style of the operating system is ...

The iSCSI gateway integrates Ceph storage and iSCSI standards to provide a high availability (HA) iSCSI target that exports RADOS block device (RBD) images to SCSI disks. The iSCSI protocol allows clients to send SCSI commands to SCSI storage devices (targets) over TCP/IP networks. This allows heterogeneous clients to access the Ceph storage cl ...

For some time, it was found that the device name could not be recognized in the Bluetooth broadcast of the spreadsheet. After debugging, it was found that the name of the device had been added repeatedly. Because we used Mijia's sdk, and then Mijia's SDK part of the code copied the original factory's ...

New Flutter Project Open Andorid Studio, appear the following interface, select the second option, and create a new Flutter project. After opening the second window, select the first option, Flutter Application, and click Next. Fill in or select the project name, Flutter SDK installation path, project save path and project description r ...

Why write this series of blogs? Because in the Android development process, generics, reflection, annotations will be used, almost all frameworks will use at least one or two of the above knowledge, such as Gson, generics, reflection, annotations, Retrofit also used generics, reflection, annotations. It is very important for us to learn these k ...

I. Preface Operating system update iteration speed is very fast, basically three or five years have a new version, WIN10 operating system is still a relatively successful system, it is said that now the market share is growing, XP share has been small, WIN7 share is gradually decreasing, in the latest WIN10 system, the lower right corner has a ...

Preface This series of articles aims to explain how to build a front-end monitoring system from scratch. The project has been sourced Project address: https://github.com/bombayjs/b... (web sdk) https://github.com/bombayjs/b... (Server, for providing api) (not finished) https://github.com/bombayjs/b... (Background management system, visual d ...

1. To use the service-side subscription function, you need to set it on the console and select the type of message you want to push. 2. Adding dependencies to the Maven project, as shown below. <dependencies> <!-- Aliyun core --> <dependency> <groupId>com.aliyun</groupId> &lt ...

Summary Internet of Things Platform Server Subscription supports sending device messages to Message Services (MNS). Cloud applications obtain device messages by listening to MNS queues. This article mainly demonstrates the use of the latest version of MNS PHP SDK to consume messages subscribed to MNS Queue. Operation steps 1. Server-side subscr ...