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This full-stack tutorial project shows how to build and deploy a real-time chat app using React on the client and Node/Express with Socket.io on the server. It covers the mechanics of establishing WebSocket connections, broadcasting and receiving messages, and maintaining active user rooms. The repository includes scripts and instructions to spin up both client and server quickly so you can experiment locally. It illustrates common patterns like event-driven messaging, joining/leaving rooms...
Ali is a simple to use C API to parse XML data. It's scanf like approach is much easier than using SAX or DOM. A tutorial, complete reference documentation, and code examples are all available.
PHBeeb, an open source PHP based BBS (message board) with a development process so clearly documented that it may act as a tutorial for those wishing to learn PHP themselves. It is designed to support advanced features such as threaded message display.