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Programming Leftovers

Submitted by Roy Schestowitz on Sunday 25th of April 2021 12:48:09 PM Filed under
Development

  • GCC 11 Releasing Next Week With Intel AMX, New CPU Support, More C++20/C++23

    GCC 11 is expected to be released next week following its recent release candidates. 

    I am currently working on more GCC 11 (and LLVM Clang 12) compiler benchmarks for publishing in the coming days while the highlights of this inaugural GCC 11.1 stable release includes: 

    - The default C++ mode is now GNU++17 (C++17) rather than C++14. 

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  • Steinar H. Gunderson: JavaScript madness

    Yesterday, I had the problem that while socket.io from the browser would work just fine against a given server endpoint (which I do not control), talking to the same server from Node.js would just give hangs and/or inscrutinable “7:::1” messages (which I later learned meant “handshake missing”).

    To skip six hours of debugging, the server set a cookie in the initial HTTP handshake, and expected to get it back when opening a WebSocket, presumably to steer the connection to the same backend that got the handshake. (Chrome didn't show the cookie in the WS debugging, but Firefox did.) So we need to keep track of chose cookies. While still remaining on socket.io 0.9.5 (for stupid reasons). 

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  • Russ Allbery: Review: Learning React

    My first JavaScript project was a React frontend to a REST service. As part of that project, I read two books: JavaScript: The Definitive Guide to learn the language foundation and this book to learn the framework on top of it. This was an unintentional experiment in the ways programming books can approach the topic.

    I commented in my review of JavaScript: the Definitive Guide that it takes the reference manual approach to the language. Learning React is the exact opposite. It's goal-driven, example-heavy, and has a problem and solution structure. The authors present a sample application, describe some desired new feature or deficiency in it, and then introduce the specific React technique that solves that problem. There is some rewriting of previous examples using more sophisticated techniques, but most chapters introduce new toy applications along with new parts of the React framework.

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  • Jussi Pakkanen: The joys of creating Xcode project files

    I did not think these words could be spoken with a straight face. But they were.

    The Xcode project file is not really even a "build file format" in the sense that it would be a high level description of the build setup that a human could read, understand and modify. Instead it seems that Xcode has an internal enterprise-quality object model and the project file is just this data structure serialised out to disk in a sort-of-like-json-designed-in-1990 syntax. This format is called a plist or a property list. Apparently there is even an XML version of the format, but fortunately I've never seen one of those. Plists are at least plain text so you can read and write them, but sufficiently like a binary that you can't meaningfully diff them which must make revision control conflict resolution a joy.

    The semantics of Xcode project files are not documented. The only way to really work with them is to define simple projects either with Xcode itself or with CMake, read the generated project file and try to reverse-engineer its contents from those. If you get it wrong Xcode prints a useless error message. The best you can hope for is that it prints the line number where the error occurred. Often it does not.

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today's howtos

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    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

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  • How To Install MongoDB on AlmaLinux 9 - idroot

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