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Programming Leftovers

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  • What is Glassmorphism? Create This New Design Effect Using Only HTML and CSS
  • Constructors in Dart – Use Cases and Examples

    Most of us are familiar with the concept of constructors. They allow us to create different instances of our classes. We can specify which parameters the class should depend on when it is being instantiated and hide inner initialization logic.

    We can have many constructors for different use cases, or we can rely on the default one.

    In dart, constructors play a similar role, but have several variations that do not exist in most programming languages. This article will go over the different use cases and examples of constructors.

  • How to Implement the Paxos Algorithm in Pure Functions

    This analogy is the same problem that we encounter in distributed systems, but you are dealing with many servers this time. We want to make many servers agree on common events or common information in an asynchronous environment.

    You can use many algorithms to solve the problems, and today we will talk about one of them: the Paxos Algorithm.

    Paxos is one of the earliest published papers about this distributed consensus algorithm that runs rounds and rounds of times to help many servers agree on a value proposed by a group member.

  • Bayes' Rule Explained For Beginners

    Bayes' Rule is the most important rule in data science. It is the mathematical rule that describes how to update a belief, given some evidence. In other words – it describes the act of learning.

  • Crystal 1.0 - What to expect

    The release of the first major release of Crystal arrives after many years of hard work. With thousands of contributions from people worldwide, it was finally possible to find consensus for what truly mattered for 1.0 and what could wait for future releases. Getting here wasn’t an easy journey, filled with enriching, controversial, delightful, and endless conversations that, in the end, made it possible to build a language more useful for more users.

    But what does it mean to have a 1.0 version? After all, the process of receiving valuable contributions and evolving the language will not stop after this milestone. Let’s dig deeper to understand the true meaning of this release for the community, especially those already using Crystal in production environments.

  • Crystal Language Version 1.0 Released

    Crystal’s syntax, according to the website, “is heavily inspired by Ruby’s, so it feels natural to read and easy to write, and has the added benefit of a lower learning curve for experienced Ruby devs.”


  • Rakudo Weekly News: 2021.13 Games Pop

    JJ Atria just announced another part of the Raku Programming Language’s growing support for games: POP, an experimental 2D game development framework. It has been inspired by frameworks like LÓVE2D and Pico-8, and by others of a similar nature. Meanwhile, it turns out that this work is complementary to Geoffrey Broadwell‘s MUGS (Multi-User Gaming Services) project. Which made it the right time to start a new IRC channel dedicated to game development using the Raku Programming Language: #raku-gamedev on Freenode.

  • Async Vision Doc Writing Sessions III

    Ryan Levick and I are hosting a number of public drafting sessions scheduled this week. Some of them are scheduled early to cover a wider range of time zones.

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.