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Programming Leftovers

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Development
  • Purism: Our tips for remote working

    Most of us don’t like writing documentation at the best of times but when going remote, a great team wiki or docs portal can help keep everyone in the loop and reduce repetitive questioning in team chat.

    Choose a solution that tracks changes (version control) and if needed, has an easy to use interface for non-technical people. We use wiki.js backed by git.

    You should document something if you have to say it more than once. This will empower people to answer their own questions by searching for the answer.

    If you are looking for a good example of team documentation take a look at GitLab’s public handbook (our wiki is private).

  • Dirk Eddelbuettel: RQuantLib 0.4.12: Small QuantLib 1.18 update

    QuantLib is a very comprehensice free/open-source library for quantitative finance; RQuantLib connects it to the R environment and language.

    This version does relatively little. When QuantLib 1.18 came out, I immediately did my usual bit of packaging it for Debian as well creating binaries via my Ubuntu PPA so that I could test the package against it. And a few call from RQuantLib are now hitting interface functions marked as ‘deprecated’ leading to compiler nags. So I fixed that in PR #146. And today CRAN sent me email to please fix in the released version—so I rolled this up as 0.4.12. Not other changes.

  • Observing Coronavirus Pandemic with Raku

    Every few years a new unknown virus pops up and starts spreading around the globe. This year, the situation with COVID-19 is different not only because of the nature of the virus but also because of the Internet. Whilst we have instant access to new information (which is often alarmist in tone) we also have the ability to access data for ourselves.

    Johns Hopkins University Center for Systems Science and Engineering synthesizes COVID-19 data from different sources, and displays it on their online dashboard. They also publish daily updates in CSV files on GitHub.

    I decided to ingest their CSV data and display it using different visualizations to reduce panic and provide a way to quickly see real numbers and trends. The result is the website covid.observer. The source files are available in the GitHub repository.

  • This Week in Rust 332
  • PyCharm 2020.1 Release Candidate

    We’ve passed the final approach fix, and we’re now established on the glideslope for the PyCharm 2020.1 release. This week’s build brings a couple of bug fixes as we hope to take the release in for a smooth landing. Let us know how we’re doing by getting this version, if you run into any issues please leave us a ticket on YouTrack.

  • EuroPython 2020: CFP for the Online Event

    Since we had started the CFP under the assumption of running an in-person conference and are now switching EuroPython 2020 to an online event, we will extend the CFP for another two weeks until April 12, to give everyone who would like to participate in this new format, a chance to submit a session proposal.

  • Visualizing Decision Trees with Python (Scikit-learn, Graphviz, Matplotlib)

    Decision trees are a popular supervised learning method for a variety of reasons. Benefits of decision trees include that they can be used for both regression and classification, they don’t require feature scaling, and they are relatively easy to interpret as you can visualize decision trees. This is not only a powerful way to understand your model, but also to communicate how your model works. Consequently, it would help to know how to make a visualization based on your model.

  • Python Bytes: #175 Python string theory with superstring.py
  • Onboarding Continuity - Building SaaS #50

    In this episode, we stepped from the welcome onboarding page to the first interactive page in the flow. I extracted the common banner for each of the templates and customized it for each of the steps in the process.

    The first thing we did was create a button on the starting page. The button connects the welcome page to the second step in the flow where the app will ask for information about the user’s school year.

    With the button in place, we created the new view to handle the school year form. Before getting into that form, I extracted the common onboarding banner into a template fragment.

  • Templates For User Interfaces

    In the previous Understand Django article, we looked at the fundamentals of using views in Django. This article will focus on templates. Templates are your primary tool in a Django project for generating a user interface. Let’s see how templates hook into views and what features Django provides with its template system.

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.