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Programming Leftovers

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  • 4 Excellent Free Books to Learn J

    The J programming language, developed in the early 1990s by Kenneth E. Iverson and Roger Hui, is an array programming language based primarily on APL (also by Iverson). It’s available on a wide variety of computers and operating systems. J is distinguished by its simple and consistent rules, a large set of built-in capabilities, powerful facilities for defining new operations, and a general and systematic treatment of arrays.

    The J system provides: an engine for executing J; various front ends that provide user interfaces to the J engine; a library, written in J, that provides an IDE (interactive development environment), numerous tools, utilities, demos, tutorials; and online documentation.

    J is a very terse array programming language, and is most suited to mathematical and statistical programming, especially when performing operations on matrices. It has also been used in extreme programming and network performance analysis.

  • First steps of sending alerts to Discord and others from syslog-ng: http() and Apprise

    A returning question I get is: “I see, that you can send alerts from syslog-ng to Slack and Telegram, but do you happen to support XYZ?” Replace XYZ with Discord and countless others. Up until recently, my regular answer has been: “Take a look at the Slack destination of syslog-ng, and based on that, you can add support for your favorite service”. Then I learned about Apprise, a notification library for Python, supporting dozens of different services.

    This blog is the first part of a series. It covers how to send log messages to Discord using the http() destination of syslog-ng and an initial try at using Apprise for alerting.

    The next part will show you a lot more flexible version of the Apprise integration: making fields configurable using templates and using a block to hide implementation details from the user.

    The Python code in these two blogs is sample code, provided to you for inspiration. They are not for production use, as among others, they lack error handling and reporting. If time and my Python knowledge permits, I might have a more production-ready code later on, that I plan to cover in a third blog.

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  • The First-Person Sequel and Roda Insights from the Lead Dev: an Exclusive Interview with Jeremy Evan

    Jeremy Evans is the lead developer of the Sequel database library, the Roda web toolkit, the Rodauth authentication framework, and many other Ruby libraries. He is the maintainer of Ruby ports for the OpenBSD operating system, and has contributed to CRuby and JRuby, as well as many popular Ruby libraries. We are happy to present a brand-new interview with Jeremy to our readers. Hope you enjoy it!

    [...]

    I have been contributing patches and bug reports occasionally to Ruby since 2009. However, I started to get more involved with Ruby in early 2019 when hearing about the direction for keyword arguments in Ruby 3. The original proposal for keyword arguments in Ruby 3 was for full separation, so that passing a hash to a method that accepts keywords would raise an error, but also that passing keywords (a hash without braces) to a method that accept an optional hash argument would also raise an error. I thought this proposal went too far, by breaking compatibility with Ruby code that did not use keyword arguments at all. I built a patch on top of the original proposal that was more backwards compatible. I ended up presenting this proposal with Yusuke Endoh at the developer meeting at RubyKaigi 2019. While waiting on a decision from Matz about keyword arguments, I started sending in patches to fix other Ruby bugs, and after quite a few patches, Endoh-san recommended I become a committer, and Matz approved.

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  • Using Subresource Integrity (SRI) in Vite with @small-tech/vite-plugin-sri

             

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    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.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.