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Course Introduction：Object-oriented programming: Detailed explanation of classes and objects (Comparison of Python and Java) This article will use Python and Java code examples to compare and explain the concepts of classes and objects, as well as the usage of constructors. 1. Classes and Objects Python: # Student class definition class Student: name = "Momo" #Create object s1 of Student class s1 = Student() print(s1.name) Java: // Student class definition class Student { String na

2025-01-20 comment 0  873

Course Introduction：Bootstrap is an open source front-end framework, and its main function is to help developers quickly build responsive websites. 1) It provides predefined CSS classes and JavaScript plug-ins to facilitate the implementation of complex UI effects. 2) The working principle of Bootstrap relies on its CSS and JavaScript components to realize responsive design through media queries. 3) Examples of usage include basic usage, such as creating buttons, and advanced usage, such as custom styles. 4) Common errors include misspelling of class names and incorrectly introducing files. It is recommended to use browser developer tools to debug. 5) Performance optimization can be achieved through custom build tools, best practices include predefined using semantic HTML and Bootstrap

2025-04-11 comment 0  1180

Course Introduction：The core of creating reusable components in Vue is to understand component structure, props usage, and logical encapsulation. 1. Clarify component responsibilities and input and output, such as defining props and update:modelValue events that receive label, placeholder, modelValue; 2. Extract styles and structures, and improve universality through class, style attributes or slots; 3. Use slots to support custom content, such as allowing label slots to pass in rich text; 4. Extract public logic into combination functions, such as encapsulating verification logic with useInputValidation to enhance component scalability and reusability.

2025-07-24 comment 0  406

Course Introduction：Bootstrap is an open source front-end framework developed by Twitter, providing rich CSS and JavaScript components, simplifying the construction of responsive websites. 1) Its grid system is based on a 12-column layout, and the display of elements under different screen sizes is controlled through class names. 2) The component library includes buttons, navigation bars, etc., which are easy to customize and use. 3) The working principle depends on CSS and JavaScript files, and you need to pay attention to handling dependencies and style conflicts. 4) The usage examples show basic and advanced usage, emphasizing the importance of custom functionality. 5) Common errors include grid system calculation errors and style coverage, which require debugging using developer tools. 6) Performance optimization recommendations only introduce necessary components and customize samples using preprocessors

2025-05-08 comment 0  476

Course Introduction：Closure is a combination of a function and its lexical scope, allowing a function to access and remember its external variables. 1. Closure is composed of functions and their environment when defined, such as inner function remembers the count in outer; 2. It is often used for data encapsulation, such as createCounter to create private variables; 3. Used as a function factory, such as makeGreeting to generate greeting functions in different languages; 4. Keep the context in event callbacks, such as setTimeout to capture loop variables; 5. Pay attention to memory usage, performance impact, and avoid excessive use, and you can choose to use class or module instead.

2025-07-15 comment 0  869

Course Elementary  13824

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  82360

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  13178

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  24628

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  27486

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.