Programmer Group

Nginx and Tomcat deployment We all know that Nginx has very high performance in high concurrency scenarios and processing static resources, but in actual projects, in addition to static resources, there are background business code modules. Generally, background business will be deployed on Web servers such as Tomcat, weblogic or websphe ...

[note] this article is translated from: [Beautiful World of Monads - DEV Community](https://dev.to/siy/beautiful-...)Let me start with the disclaimer. From the perspective of functional programming, the following explanation is by no means accurate or absolutely accurate. On the contrary, I will focus on the clarity and simplicity of the explan ...

Through the application of array, function and loop knowledge, we can independently create a project - Sanzi chess. First of all, we should have a general idea and logic for the implementation of Sanzi chess. File creation If you want to do a good job, you must first sharpen your tools. In order to better complete the project, first create th ...

1, Serial connection Prepare two USB to TTLS and several DuPont cables, cross connect the RX and TX pins of the two USB to TTLS, and connect the two USB interfaces to a laptop (simulate the serial port transmission between the two computers). 2, Transfer file Using the serial port debugging assistant that can transfer files (I use SSCOM ...

1, IntroductionRecently, due to work, I came into contact with the framework a little more. It is inevitable to deal with Binder and sort out some relevant knowledge, but I was still a little flustered when preparing to write this article. Moreover, the complexity of the whole Binder mechanism can not be described clearly in a few words. I'm al ...

This article is excerpted from "design patterns should be learned this way" 1 encapsulate product creation details using simple factory mode Next, let's look at the code and take the creation of an online course as an example. Assuming that there are courses such as Java architecture, big data and artificial intelligence, an ecosyste ...

When the client connects to the MySQL server, it must provide valid identity authentication, such as user name and password. When the user performs any database operation, the server will verify whether the user has corresponding permissions. For example, SELECT permission is required for query tables and DROP permission is required for deletin ...

Django is a Python web framework[ ˈ d ʒ æ ŋɡ o] It is called "Ginger dog" in Chinese. Why learn framework? In fact, we can write a web site from 0 to 1 in Python code, but in that case, we need to write the underlying code such as network service, database reading and writing. The role of the framework is to build these underly ...

Array overviewArray declaration creationArray usageMultidimensional arrayArrays classSparse array Definition of array An array is an ordered collection of data of the same typeArray describes several data of the same type, which are arranged and combined in a certain orderEach data is called an array unit, and each array element can access ...

Detailed explanation of dpkg command in Ubuntu system Dpkg, package manager for Debian, is a major package management tool in Debian and Debian based systems. It can be used to install, build, uninstall and manage deb format software packages. The main and more friendly front end of dpkg is aptitude. Dpkg itself is completely controlled by comm ...