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Programming: Racket, Perl and Raku, GNU/Bash

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  • Excellent Free Tutorials to Learn Racket

    Racket is a general-purpose, object-oriented, multi-paradigm, functional, imperative, logic based programming language based on the Scheme dialect of Lisp. It’s designed to be a platform for programming language design and implementation.

    Racket is also used to refer to the family of Racket programming languages and the set of tools supporting development on and with Racket. It has a powerful cross-platform GUI library built in.

    Racket’s core language includes macros, modules, lexical closures, tail calls, delimited continuations, parameters (fluid variables), software contracts, green and OS threads, and more. The language also comes with primitives, such as eventspaces and custodians, which control resource management and enables the language to act like an operating system for loading and managing other programs.

    Racket is often used for scripting, computer science education, and research. It’s an open-source project (Apache/MIT).

    Here’s our recommended tutorials to learn Racket.

  • Pangeo with Dask Gateway

    Over the past few weeks, we have made some exciting changes to Pangeo’s cloud deployments. These changes will make using Pangeo’s clusters easier for users while making the deployments more secure and maintainable for administrators.

    Going all the way back to the initial prototype, Pangeo’s cloud deployments have combined a user interface like Jupyterlab with scalable computing. Until recently, Pangeo used Dask Kubernetes to start Dask clusters on a Kubernetes cluster. This worked well for several years, but there were a few drawbacks.

  • We are happy to announce the first release of Jaybird 4.

    We are happy to announce the first release of Jaybird 4.

    Jaybird 4 is – compared to Jaybird 3 – an incremental release that builds on the foundations of Jaybird 3.
    The focus of this release has been on further improving JDBC support and adding support for the new data types and features of Firebird 4.

  • How failure-driven development makes you successful

    My job title is senior software engineer, but that's not what my closest co-workers call me. They call me "Cherrybomb" because of all the things I blow up. My regularly scheduled failures have been tracked down to our quarterly earnings and outage times. Literally, I am the production disaster you read about that says, "what not to do ever, in any case, at any time."

    I started my career at a helpdesk where I wrote loops that wrecked servers in high-end companies. I have taken production applications down for up to eight hours without warning, and I have destroyed endless numbers of clusters in an attempt to make things better—and a couple just because I mistyped something.

    I am the reason we have disaster recovery (DR) clusters in Kubernetes. I am the chaos engineer that, without warning, teaches people how to act and troubleshoot quickly when we have an application that has never been tested for an outage recovery plan. I exist as the best example of failure possible, and it's actually the coolest thing ever.

  • Digital Making at Home: Making games
  • Code Hyper Sports’ shooting minigame | Wireframe #35
  • If you've ever wished Visual Studio Code could be more open source, the Eclipse Foundation would like a word

    The Eclipse Foundation has pulled back the curtains on version 1.0 of Theia, an alternative to Microsoft's developer darling of the hour, Visual Studio Code.

    Except it isn't just yet. Those hoping to ditch a Microsoft-branded IDE for something more vendor-neutral might have a while to wait for something to drop from Eclipse itself, although a hop to somewhere like Gitpod will give those interested a look at the cloudy version.

    Eclipse Theia is a framework on which organisations can build and brand their own products, on the desktop or online, rather than a standalone editor.

  • 2020.13 NoConf Reached

    It’s a sad moment in time when you realize that basically all conferences have been cancelled for the foreseeable future: the Perl and Raku Conference in Houston, Perl & Raku Con in Amsterdam to name but a few. Some organizers even came to the conclusion that organizing “in person” events is no longer a viable business model (/r/perl comments).

  • More mojibake fun

    The names contain reconstructable replos. A 2-byte, UTF-8 encoded character was read by a Windows program byte-by-byte to produce 2 new 1-byte characters, and those 2 1-byte characters were converted back to UTF-8 as 2-byte ones.

  • D is for Devilish Place Names

    The downloaded file is a format called CSV ("Comma Separated Values", though in this case they're separated by the pipe character, "|"), typically used in spreadsheets. I'm not really a spreadsheet person, and CSV files are just as easy to analyze using basic shell tools. Most Linux users are familiar with the power of the command line, but don't feel left out if you're not using Linux: the commands I'll show work fine on a Mac, and they probably work on Windows too if you use the Linux Subsystem for Windows.

    I started with a basic count. I'd seen already, on the website's search page, that a lot of the names didn't actually have "Devil" in the name even though that's what I searched for, so that 1883 number is bogus. So I ran a grep -i devil to pick out the place names that actually do have "devil" in the name (-i means "ignore case", so it will find devil as well as Devil). Then I piped the result through wc, word count, using -l to count the number of matching lines:

    grep -i devil GNIS_Devil.csv | wc -l

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.