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Course Introduction：Use FormRequests to extract complex form verification logic from the controller, improving code maintainability and reusability. 1. Creation method: Generate the request class through the Artisan command make:request; 2. Definition rules: Set field verification logic in the rules() method; 3. Controller use: directly receive requests with this class as a parameter, and Laravel automatically verify; 4. Authorization judgment: Control user permissions through the authorize() method; 5. Dynamic adjustment rules: dynamically return different verification rules according to the request content.

2025-07-30 comment 0  500

Course Introduction：The core methods of Python metaprogramming include: 1. Use type to dynamically create classes; 2. Control the class creation process through metaclasses; 3. Use decorators to modify functions or class behavior; 4. Dynamically modify object functions at runtime. These mechanisms allow developers to dynamically generate or modify code structures at runtime. For example, type can construct classes based on parameters, metaclasses can be used for interface consistency verification or automatically register subclasses, decorators are widely used in property encapsulation or framework routing management, while monkey patches support temporary enhancement class functionality, suitable for testing mocks or emergency fixes, but abuse should be avoided to maintain code maintainability.

2025-07-18 comment 0  424

Course Introduction：PHP dynamically generates HTML content by running scripts on the server side, making the website interactive and real-time. 1. It obtains data from the database according to user requests and dynamically splices web page content, realizing that a set of code supports a large number of pages; 2. PHP often cooperates with MySQL to handle functions such as login verification, comment system, etc. that require data storage and query; 3. Use template engines (such as Smarty or Blade) or view separation technology to separate logic from presentation, improving code maintainability; 4. Combine cache mechanisms such as OPcache and Memcached to optimize performance, reduce duplicate parsing and database pressure, thereby efficiently supporting dynamic website operation.

2025-07-18 comment 0  521

Course Introduction：Laravel provides a variety of advanced data verification technologies, including encapsulating complex logic using custom rule objects, reusing verification rules using form requests, implementing conditional verification through sometimes methods, and uniqueness checking in combination with database rules. First, create a custom rule class through make:rule and define logic in passes() and message() methods, so complex verification such as age limit can be achieved; second, create a form request class using make:request to separate the verification logic and directly inject it into the controller to improve the code organization structure; third, call the sometimes() method to dynamically decide whether to verify a certain field based on the input value, which is suitable for dynamic forms

2025-07-02 comment 0  193

Course Introduction：Java17 is a long-term supported version that brings safer, concise and efficient code improvements. 1. Use sealed class to control the inheritance of the class, explicitly allowable subclasses through permits, and require the subclass to be marked as final, sealed or non-sealed; 2. Switch pattern matching becomes the standard, supporting directly declaring variables and type matching in the case, and combining sealed class to achieve exhaustive inspection; 3. Record class provides concise immutable data carrier syntax, automatically generates constructors, getters, equals, hashCode and toString, supporting custom methods and compact constructor verification; 4.instanceof

2025-08-06 comment 0  506

Course Elementary  13891

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  82444

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  13237

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  24695

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  27541

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.