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Course Introduction：Five super cool jQuery touch sliding picture library plug-ins are recommended to help you display your products or portfolios in a wonderful way! Users can swipe up and down, left and right to switch pictures, which is worth a try! Related articles: 30 Best Free Android Media Players Add jQuery drag/touch support for iPad Hammer.js touch carousel diagram A JavaScript library for multi-touch gestures. Source code demonstration 2. TouchSwipe TouchSwipe is a jQuery plug-in that can be used with jQuery on touch devices such as iPad and iPhone. Source code demonstration 3. TouchWipe Allows you to use iPhone, iPad or i

2025-02-23 comment 0  1002

Course Introduction：Nested CASEWHEN statements are used to handle complex SQL conditional branches. 1. It achieves multi-condition judgment through multi-layer nesting, similar to a tree-like structure, with the outer layer as a tree trunk and the inner layer as a tree branch. 2. In order to improve readability and maintainability, it is necessary to make good use of comments, standardize code formats, and consider using auxiliary tables or functions to simplify logic. 3. The key to avoiding traps is to avoid missing ELSE statements, carefully check the logic to avoid errors, and pay attention to optimizing performance to prevent excessive nesting from affecting query efficiency. Only by mastering these skills can you efficiently use nested CASEWHEN statements.

2025-04-08 comment 0  973

Course Introduction：Clustered index determines the physical storage order of data, and each table can only have one; non-clustered indexes create independent structures, and there can be multiple ones. 1. Clustered indexes are suitable for columns with high uniqueness, frequent queries, and many range queries, such as primary keys or commonly used filtering condition fields, but will affect the insertion performance. 2. Non-clustered indexes are suitable for different query scenarios. Data rows are positioned through pointers and support multi-field composite indexes. The most commonly filtered fields should be placed in front of them, and overwrite indexes can be built to avoid back-to-table queries. 3. Creating indexes requires weighing read and write performance, avoiding excessive indexes that increase maintenance overhead and occupy additional space. The query mode should be analyzed in combination with the execution plan and designed reasonably to achieve the optimal effect.

2025-07-07 comment 0  236

Course Introduction：Media query is the basic tool for responsive website design, enabling multi-device compatibility by switching styles based on device characteristics (such as screen width). Its basic syntax is @media media type and (condition){CSS rules}, for example, using @mediascreenand(max-width:767px) to adjust the style of the small screen. It is recommended to adopt a mobile priority strategy, first define the mobile phone style and then gradually adapt to a larger screen. Pay attention to when using: ① Select a general breakpoint instead of a specific device size; ② Set the viewport meta tag to ensure that the mobile terminal takes effect; ③ Avoid relying solely on browser zoom tests; ④ Only modify the styles that need to be adjusted in media queries. Mastering media queries helps build a responsive layout with clear structure and easy to maintain.

2025-06-30 comment 0  492

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 Elementary  13744

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.