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Hello, everyone. I'm a student in the java learning circle who doesn't want to disclose my name and lives a shoddy life. If there are mistakes in the article, I hope Haihan. You're welcome to make more corrections If you get useful dry goods knowledge from this article, please give me a favor. It is said that all the likes have got offer s ...

This article is excerpted from "design patterns should be learned this way" 1. Application scenario of intermediary mode In real life, the existence of intermediaries is indispensable. Without intermediaries, we can't communicate with distant friends. Each colleague object will reference each other. If each object interacts with mult ...

Singleton mode Singleton Pattern is a creation pattern. It involves a single class that is responsible for creating its own objects and ensuring that only one object is created. This class provides a unique way to access objects, which can be accessed directly without instantiating the objects of this class. Attention A singleton class can c ...

Pre knowledge, six principles of design pattern General principle: Open Close Principle The opening and closing principle means that it is open to extensions and closed to modifications. When the program needs to be expanded, you can't modify the original code, but expand the original code to achieve a hot plug effect. So in a word, in order t ...

demand It is required to facilitate the expansion of pizza types and maintenance There are many kinds of pizzaPizza making includes prepare, bake, cut and boxComplete pizza shop ordering function Traditional way Class diagram code /** * @Classname Pizza * @Description * @Date 2021/9/28 14:12 * @Author Yzx */ public class Pizza ...

This article is excerpted from "design patterns should be learned this way"1 use memo mode to realize the draft box functionWe have all used the rich text editor in web pages. The editor usually comes with operations such as draft box and undo. The following code is used to realize such a function. Suppose we publish an article in the ...

This article is excerpted from "design patterns should be learned this way"1 UML class diagram of command patternThe UML class diagram of the command pattern is shown in the following figure.2 reconstruct the player control bar using command modeIf we develop a player, the player has playback function, drag progress bar function, stop ...

How to customize? The Helper holds a reference to the view, so you can get the view (getViews) and then operate the viewcallback before and after onLayout (updateprelay / updateprelay) is providedThe Helper inherits the view, so the Helper itself is also a view CircularRevealHelper [the external chain picture transfer fails. The source stati ...

This series of articles is translated from the official cmake tutorial: [cmake tutorial]( ). Sample program address: [github.com/rangaofei/t...]( ) I won't just stay in the official tutorial. As an Android Developer, I really don't have linux c program development experience. I hope the big guys will forgive me. The tutorial is completed u ...

The third-party link of the wechat payment page needs 100 million advertising fees. The wechat payment page is very suitable for functional navigation. This article uses ListView and GridView to imitate the wechat payment page, and introduces how to decorate the background and edge style of a component. On the left is the wechat payment interf ...