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Programming Leftovers

Submitted by Roy Schestowitz on Tuesday 10th of May 2022 07:42:08 AM Filed under
Development
  • Elevator Data Structures and Algorithms

    I lived in NYC for six years. I probably spent 1 minute/day on and waiting for elevators during that time. Spending at least 1.5 days of your life with elevators, one can't help to think about what they are doing.

    Hard disk-seeking algorithms influenced many elevator algorithms (or maybe the other way around?). One way to think about it: hard disks need to read ("pick up") and write ("drop off") requests at different locations on the disk ("floors").

    Here are some elevator algorithms, starting with the most naive and working towards better implementations.

  • You say “cave dweller debugging”, I say debug logging

    The third benefit is that you communicate to everybody else that this part of the code is hard to understand and needed careful inspection. This can be the motivation the team needs to discuss a redesign, or it can help other people find smoking guns when trying to diagnose other failures.

  • Standing on the shoulders of giants and leaky abstractions

    So on the topic, I’ll share my opinion on the matter based on my experience as an OSS maintainer building on top of sequel versus an alternative built for rails (and therefore, activerecord).

  • The basics of prototyping and exporting your plots in R

    It’s super rewarding when you finally figure out how to plot and visualize your data. But to show off your plot to the rest of the world, you need to first be able to save and export it from your R Studio workspace.

    In this tutorial, I’m going to show you how to prototype, save, and export your plots from R. (Note, I use the term ‘plot’ and ‘figure’ interchangeably to mean the same thing: a data visualization!)

  • 2022.19 DocuBlast – Rakudo Weekly News

    Current known efforts are documented in the wiki. In an effort to keep volunteers coordinated, please look for a monthly call starting in May, and status updates reported out on the wiki. Or you can check in on the new #raku-doc IRC channel! Or the more old-fashioned mailing-list.

    The documentation effort can always use volunteers for content creation, editing, as well as front end web development, and raku scripting. So if you have suggestions and/or would like to contribute to the documentation effort in any way, this is your chance!

»

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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.

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