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Course Introduction：Understanding the performance of singleton mode in multi-threaded and multi-process environments In programming, singleton mode is a design pattern that ensures that there is only one instance of a class...

2025-04-01 comment 0  516

Course Introduction：Best Practices for PHP Singleton ClassesThe Singleton design pattern provides a means to ensure that only one instance of a class exists within an...

2024-11-12 comment 0  734

Course Introduction：The most commonly used design patterns in C include singleton mode, factory mode, observer mode, and policy mode. Singleton mode ensures that a class has only one instance and provides global access points, which is often used in scenarios such as configuration managers; factory mode encapsulates the object creation process so that the caller does not need to know the specific class name, which is suitable for situations where the object creation logic is complex or changeable; observer mode implements a one-to-many dependency notification mechanism, which is widely used in UI updates or event listening systems; policy mode allows runtime switching algorithms or behaviors, and is suitable for scenarios such as payment systems that require dynamic changes in processing methods. These modes help developers build clearer and easier to maintain code structures by decoupling, hiding implementation details, and improving scalability.

2025-07-25 comment 0  324

Course Introduction：C's static member variables and functions belong to classes rather than objects and are shared among all instances. static member variables are used to save the status information of the class. For example, object counting, which must be defined outside the class, such as counting the number of objects created; static member functions can access static members, suitable for tool methods, singleton mode and other scenarios, but cannot access non-static members; when using it, you need to pay attention to issues such as initialization order, life cycle, thread safety, and access permissions; typical applications include object counting, global configuration management, tool classes, singleton mode and resource cache.

2025-07-09 comment 0  210

Course Introduction：PHP 5.2 Strict Mode: Why the Disallowance of Abstract Static Class Methods?In PHP 5.2, enabling strict warnings may trigger a familiar warning:...

2024-11-11 comment 0  1163

Course Elementary  13819

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82352

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13173

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24624

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27483

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.