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Course Introduction：Bootstrap provides an easy way to center images, but Media Query can help you control the position of images under different screen sizes. With Media Query, you can adjust the image display according to the device width, or even use different images. Flexible mastery of Bootstrap and Media Query can achieve responsive and beautiful picture layouts, but don't forget to consider vertical centering and performance optimization.

2025-04-07 comment 0  802

Course Introduction：How to use polymorphism and design patterns in combination? The combination of polymorphism and design patterns can enhance the flexibility and maintainability of the code by: 1. The policy pattern uses polymorphism to define the algorithm family, making it interchangeable at runtime; 2. The template method pattern delays the implementation of algorithm steps in the subclass through polymorphism; 3. The visitor pattern uses polymorphism in the form of double-scheduling, allowing new operations to be added in the class hierarchy.

2025-06-21 comment 0  236

Course Introduction：SQL Query to Determine Top N Items for Each StoreTo find the top N items sold for each store in a single query, we can leverage a combination of...

2024-12-29 comment 0  901

Course Introduction：Creating Comma-Delimited Lists with SQL ServerQuery ExplanationThe provided query utilizes a combination of FOR XML PATH and STUFFF to generate...

2025-01-18 comment 0  831

Course Introduction：Composite Key for MySQL's 'UPDATE ON DUPLICATE KEY'Question:How can you efficiently perform a query that updates a row if a specific combination...

2024-12-16 comment 0  573

Course Elementary  13779

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  82295

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  13148

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  24595

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  27456

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.