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First of all, it must be said that the direction of this is indeterminate when the function is defined. Only when the function is executed can it be determined who this is pointing to. In fact, this ultimately points to the object that called it. (There are some problems with this sentence, which will be explained later. Although most articles ...

How to use official SDK files to assist development 1. First of all, what is SDK? SDK or SDK package refers to a software development kit synchronously launched by semiconductor manufacturers for their own chips. It can simply provide some files of application program interface API for a programming language, but it may also include complex har ...

summary A variable is defined in Go. Whether it is allocated on the heap or on the stack. The official Go document tells us that it doesn't need to be controlled. They will analyze it. In fact, this analysis is escape analysis Generally speaking, when the pointer of an object is referenced by multiple methods or threads, we call the pointer a ...

Article catalogpreface1, Dependency Inversion Principle (DIP)2, Use stepsExamplesummaryprefaceThere are seven commonly used object-oriented design principles. These seven design principles are based on maintainability and reusability. These principles do not exist in isolation. They are interdependent and complementary. Following these design p ...

IO stream First, we should understand external memory, memory and cache io is divided into input and output: Personal understanding: Output stream: output the file from the idea Input stream: read the file to the idea Input and output can be divided into: Byte stream: the smallest data unit in a data stream is bytes Output: OutputSt ...

The thing is, I have a little hobby that is not consistent with the social status of social animals - listening to musicals. Basically, I click to open the video on station B. I don't want to listen to music on Netease cloud or QQ, but on these music software, I either charge for the clips I want to listen to, or the version is not what I like, ...

Introduction to Spring MVC Spring MVC is the framework design Srping provides for Web applications. SpringMVC is a typical textbook-style MVC framework, unlike Struts and others, which are variants or are not entirely mvc-based. Spring MVC has clear roles, detailed division of labor, and seamlessly combines with the Spring framework. As the m ...

Catalog What is object serialization Why serialization and deserialization are required Knowledge of serialization and deserialization What if some fields in Java serialization do not want to be serialized? Java Serialization Interface   java.io.Serializable Class refactoring using serialization and serialVersionUID Java Externaliza ...

SQLite command Point command Use. help to get a list of point commands command option describe .backup ?DB? FILE Back up the DB database (the default is "main") to the FILE file. .bail ON|OFF Stop when an error occurs. The default is OFF. .databases Lists the name of the database and the files to which it is attached. . ...

elementUI framework learning notes 1. Create a Vue cli scaffold Initialization: vue init webpackInstallation package: npm installInstalling elementui: NPM I element UI - SInstall axios: npm install axios -SInstall Router: NPM install Vue router - s and configure routing.Introduce components and configure routing.Start project: npm run dev ...