Course 2857
Course Introduction:Course introduction: 1. Cross-domain processing, token management, route interception; 2. Real interface debugging, API layer encapsulation; 3. Secondary encapsulation of Echarts and paging components; 4. Vue packaging optimization and answers to common problems.
Course 1795
Course Introduction:Apipost is an API R&D collaboration platform that integrates API design, API debugging, API documentation, and automated testing. It supports grpc, http, websocket, socketio, and socketjs type interface debugging, and supports privatized deployment. Before formally learning ApiPost, you must understand some related concepts, development models, and professional terminology. Apipost official website: https://www.apipost.cn
Course 5521
Course Introduction:(Consult WeChat: phpcn01) The comprehensive practical course aims to consolidate the learning results of the first two stages, achieve flexible application of front-end and PHP core knowledge points, complete your own projects through practical training, and provide guidance on online implementation. Comprehensive practical key practical courses include: social e-commerce system backend development, product management, payment/order management, customer management, distribution/coupon system design, the entire WeChat/Alipay payment process, Alibaba Cloud/Pagoda operation and maintenance, and project online operation. .....
Course 5172
Course Introduction:(Consult WeChat: phpcn01) Starting from scratch, you can solve conventional business logic, operate MySQL with PHP to add, delete, modify, and query, display dynamic website data, master the MVC framework, master the basics of the ThinkPHP6 framework, and learn and flexibly master all knowledge involved in PHP development. point.
Course 8713
Course Introduction:(Consult WeChat: phpcn01) The learning objectives of the front-end development part of the 22nd issue of PHP Chinese website: 1. HTML5/CSS3; 2. JavaScript/ES6; 3. Node basics; 4. Vue3 basics and advanced; 5. Mobile mall/ Website background homepage layout; 6. Automatic calculation of tabs/carousels/shopping carts...
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Implementing observer pattern in PHP
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Course Introduction:How to implement the observer pattern in PHP: first create a PHP sample file; then register the observer with the theme; finally, traverse the registration tree and let each object implement the operations provided by its interface.
2021-03-15 comment 0 1925
Course Introduction:观察者模式是一种软件设计模式,允许对象在不显式相互引用或了解彼此的情况下通信,主要用于松散耦合组件或实现事件处理系统。在C++中,可以通过抽象类实现观察者模式:1.定义抽象类Subject,它定义观察者必须实现的方法。2.定义观察者接口Observer,它定义了观察者必须实现的方法。3.实现具体主题,继承自Subject并提供具体行为。4.实现具体观察者,实现Observer接口并定义它对更新的响应。
2024-06-06 comment 0 196
Course Introduction:Design patterns are a widely used concept in modern software development. Design patterns are common solutions found in software systems that are tested and proven to help developers build complex software applications more efficiently. The observer pattern is one of the most common design patterns, and it is also an important concept that PHP developers need to master. In this article, we will introduce the concept and implementation of the Observer pattern and demonstrate how to use it in a PHP application. What is the observer pattern? Observer pattern is a
2023-05-20 comment 0 762
Course Introduction:PHP中的观察者模式是一种设计模式,允许观察者订阅主题的状态变化并做出响应。当主题状态更改时,它会通知观察者,观察者可以相应地更新自己:主题类维护一个观察者列表并提供方法附加和删除观察者。主题类提供获取和设置状态的方法,当状态更改时触发观察者通知。观察者类定义了一个更新方法,在主题状态更改时调用。具体观察者类实现更新方法以更新自己的逻辑。在实践中,观察者订阅主题,当主题状态更改时,观察者收到通知并更新自己。
2024-05-21 comment 536
Course Introduction:The conceptual observer pattern, also called the publish-subscribe pattern, is a one-to-many relationship between objects. When the state of an object changes, all objects that depend on it are notified and automatically updated to form an abstract topic role (Subject). Also called abstract target class, the abstract subject knows which observers it has, provides methods for deleting and adding observers, and abstract methods for notifying observers. The abstract observer role (Observer) is implemented by an abstract class or interface and contains an update The abstract method is called after receiving the update notification of the specific topic. The concrete topic role (ConcreteSubject) is implemented by the abstract class or interface, also called the specific target class. The notification method of the abstract target class is implemented. When the specific topic changes, it is called.
2023-04-18 comment 0 1451