Course Introduction：This article explores the techniques for accessing PHP object properties:直接访问属性和通过 $this 访问属性。The authors discuss their application according to their different behaviors—primarily regarding error handling—providing a clear understanding for efficien

2024-10-22 comment 0  1149

Course Introduction：Docker通过以下方式标识容器：容器名称：唯一标识符，创建时指定。 Container ID: A unique identifier generated by Docker.摘要：基于映像内容生成的唯一标识符。标签：键值对，用于组织和标识容器。扩展网络别名：用于在多个容器之间发现的唯一别名。 Docker Swarm服务名称：引用特定容器的服务集合的名称。 Docker Engine API：允许通过名称、ID或摘要引用容器。

2025-04-15 comment 0  645

Course Introduction：Use Playwright in Vue projects mainly for end-to-end (E2E) testing. 1.安装Playwright可通过npm或yarn执行命令并选择默认配置开始；2.编写测试时，将测试文件放在tests/目录，利用page.goto()、click()和expect()等API验证页面交互；3.对于VueRouter和Vuex，Playwright能模拟真实行为，可测试路由跳转和状态变化，并通过拦截API请求提高测试稳定性；4.调试时可使用--headed参数或playwrightshow-trace查看执行过

2025-07-06 comment 0  566

Course Introduction：Your iPhone alarm clock does not ring may be caused by several common reasons. The following are specific problems and solutions: 1. Confirm whether the alarm is enabled, turn on the clock app to check whether the blue switch next to the alarm clock is on, and check the time and AM/PM settings; 2. Make sure the ringtone sound volume is high enough, go to "Settings" > "Sound and Touch" to turn up the volume, and test the alarm sound; 3. Check whether Do Not Disturb the alarm clock is blocked, go to "Settings" > "Do Not Disturb the Mode" to turn off the function or adjust its time schedule; 4. The clock app may have a malfunction, try to delete and reset the alarm, restart the iPhone, or update to the latest iOS version.这些问题通常通过逐一排查即可解决。

2025-07-17 comment 0  345

Course Introduction：This article aims to solve the problem of invalidating the align="center" attribute in HTML and provide alternatives.通过分析inline元素特性，解释了该属性失效的原因。 The article details how to use the CSS style text-align: center and combine the div elements to achieve text centering alignment, and provides corresponding code examples and precautions to help developers better master the implementation method of HTML text centering.

2025-08-26 comment 0  858

Course Elementary  13954

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  82521

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  13292

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  24772

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  27594

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.