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Programming Leftovers

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  • DIP1000: Memory Safety in a Modern System Programming Language Pt. 1

    D is both a garbage-collected programming language and an efficient raw memory access language. Modern high-level languages like D are memory safe, preventing users from accidently reading or writing to unused memory or breaking the type system of the language.

    As a systems programming language, not all of D can give such guarantees, but it does have a memory-safe subset that uses the garbage collector to take care of memory management much like Java, C#, or Go. A D codebase, even in a systems programming project, should aim to remain within that memory-safe subset where practical. D provides the @safe function attribute to verify that a function uses only memory-safe features of the language. For instance, try this.

  • a brief history of one line fixes

    What do all these earlier mistakes have in common? First, they’re all exemples of “catastrophic loss of structural integrity” as I used to say in my Star Trek days. Second, they all date from before 2013. That’s how we know the NSA wasn’t involved.

  • Mental Model: Difficult Problems vs. Hard Work

    I think about this distinction regularly in the context of software engineering, though I think it probably applies to most “knowledge work”. At an intuitive level, I think we’ve all encountered this: there are problems that are solvable by throwing a lot of human-hours at it (“Hard Work”), and problems that are not a function of raw work hours, but rather require dealing with ambiguity (“Difficult Problems”).

    The more unpredictable the task is as a function of allocated effort to task completion, the more likely it is to be a Difficult Problem.

  • Installing and Using Rich Package in Python

    In this article, We are going to learn how to install and use rich packages in Python.

    RIch is a python package for creating some awesome terminal formatting and logging. It has several features and functions that can make your application look nicer and even add a new look to your CLI application. We will be understanding the process of installing and basic usage of the RICH package in Python in this article.

  • How to Split a File into a List in Python

    When we want each line of the file to be listed at consecutive positions where each line becomes an element in the file, the splitlines() or rstrip() method is used to split a file into a list. Let’s see a few examples to see how it’s done.

  • Creating a scrolling background in Pygame

    In this article, we are going to know how to create a scrolling background in Pygame.

    Pygame offers many advantages for developing basic infrastructure for many games. One of them is the scrolling background. Many of the popular games of all time required this feature of endless scrolling. This scrolling background helps to make the background more creative with less effort.

    In a scrolling background, one image is considered as a background that will repeat itself again and again. Thus creating a scrolling endless loop of images. Suppose in a Pygame shell we move a single image from one coordinate to another, thus shifting the pixel of one image to another. Now, these blank pixels can be filled by the other image.

  • PyGame Set Mouse Cursor from Bitmap

    In this article, we are going to see how to set the mouse cursor from bitmap using the PyGame module in Python.

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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.

Red Hat Hires a Blind Software Engineer to Improve Accessibility on Linux Desktop

Accessibility on a Linux desktop is not one of the strongest points to highlight. However, GNOME, one of the best desktop environments, has managed to do better comparatively (I think). In a blog post by Christian Fredrik Schaller (Director for Desktop/Graphics, Red Hat), he mentions that they are making serious efforts to improve accessibility. Starting with Red Hat hiring Lukas Tyrychtr, who is a blind software engineer to lead the effort in improving Red Hat Enterprise Linux, and Fedora Workstation in terms of accessibility. Read more

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