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Course Introduction：HTML5Canvas is suitable for web graphics and animations, and uses JavaScript to operate context drawing; ① First add canvas tags to HTML and get 2D context; ② Use fillRect, arc and other methods to draw graphics; ③ Animation is achieved by clearing the canvas, redrawing, and requestAnimationFrame loops; ④ Complex functions require manual processing of event detection, image drawing and object encapsulation.

2025-07-05 comment 0  639

Course Introduction：CanvasAPI is a tool in HTML5 used to draw graphics on web pages and needs to be operated through JavaScript. 1. First add elements and set the size in HTML; 2. Use JavaScript to obtain the canvas element and its 2D rendering context (ctx); 3. Use context methods to draw shapes, such as fillRect() to fill rectangles, strokeRect() to stroke rectangles, and clearRect() to clear the area; 4. When drawing complex paths, use beginPath(), moveTo(), lineTo(), closePath() and other methods to build the path and fill or stroke; 5. Animation implementation depends on requests

2025-06-20 comment 0  973

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  674

Course Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w

2025-01-10 comment 0  818

Course Introduction：Conditional Column CountingConsider a table named "Jobs" structured as follows:jobId, jobName, Prioritywhere "Priority" is an integer between 1...

2025-01-10 comment 0  827

Course Elementary  13776

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  82287

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  13145

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  24592

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  27450

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.