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 0 905
Course Introduction：This article describes how to set the properties of HTML elements by class name using the setAttribute() method in JavaScript. The focus is on understanding the usage of getElementsByClassName() and how to deal with the situation where multiple elements have the same class name, and provide code examples and precautions to help developers operate the DOM more efficiently.
2025-08-30 comment 0 535
Course Introduction：This article explores common problems in managing and storing class instance arrays through the Context Provider in React applications and trying to call these instance methods. The focus is on explaining the feature that the Array.prototype.forEach method always returns undefined, and how to correctly traverse the array and get the return value of each instance method, avoid misunderstandings and errors, and provide examples of correct usage of map and forEach.
2025-08-28 comment 0 558
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 1199
Course Introduction：This tutorial discusses in detail how to use the notification mechanism of the PyADS library to efficiently and Pythonically process large amounts of real-time data from the PLC. The article introduces the method of managing internal state and accumulated data through class encapsulation callback functions, effectively avoiding the use of global variables. At the same time, the tutorial explains in-depth strategies to optimize data parsing performance, including using return_ctypes=True combined with NumPy for batch data conversion, and provides practical examples to monitor PLC state changes, aiming to help developers build robust and high-performance industrial data acquisition applications.
2025-08-11 comment 0 276
Course Elementary 13924
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 82479
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 13263
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 24727
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 27562
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.
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