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Course Introduction：Class methods automatically receive classes as the first parameter, suitable for creating or operating class-level data; static methods do not bind any parameters, suitable for functions related to classes but do not need to access classes or instances. 1. Class methods are often used as alternative constructors or processing class states, such as creating objects through string parsing; 2. Static methods are used to classify ordinary functions in classes, such as verifying whether age is legal; 3. If you need to access class states, use @classmethod, if you only need to classify tool functions, use @staticmethod, and use instance methods to access instance properties.

2025-07-08 comment 0  496

Course Introduction：Custom instructions are suitable for use in scenarios where DOM is directly operated, such as automatic focus of input boxes, permission control, lazy loading of pictures, etc. Common scenarios include: 1. The input box automatically gets focus; 2. The permission control button is displayed or disabled; 3. The implementation of lazy loading or animation triggering; 4. The numerical formatting display. It can be registered globally or locally when creating, and the commonly used hooks are inserted and updated. For example, the permission directive v-permission can control whether the element is displayed according to the user role. When using it, you should pay attention to combining binding.value parameters and executing logic in appropriate hooks, while avoiding abuse to maintain data-driven principles.

2025-07-05 comment 0  484

Course Introduction：Parsing strings is a very common and important operation in PHP, and you will use it whether you are processing user input, reading file content, or interacting with a database. Today we will explore in-depth various methods and techniques for parsing strings in PHP. In PHP, there are many ways to parse strings, from simple string functions to regular expressions to more complex parsing libraries, each with its own unique application scenarios and advantages and disadvantages. Let’s start from the most basic and gradually deepen into more complex analytical techniques. First, let's take a look at the most commonly used string functions in PHP. These functions are simple and easy to use and are suitable for handling basic string operations. For example, the exploit() function can split the string into numbers according to the specified separator.

2025-05-20 comment 0  469

Course Introduction：SqlParameter Parameters.Add vs. AddWithValue: Choosing the Best MethodWhen working with SQL commands, you may encounter the need to add...

2025-01-10 comment 0  654

Course Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w

2025-01-10 comment 0  777

Course Elementary  13745

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  82260

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  13130

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  24578

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  27436

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.