Language Selection

English French German Italian Portuguese Spanish

Programming Leftovers

Submitted by Roy Schestowitz on Sunday 26th of January 2020 05:45:28 AM Filed under
Development
  • Python 3.9.0a3
  • Python 3.9.0a3 now available for testing

    Python 3.9 is still in development. This releasee, 3.9.0a3 is the third of six planned alpha releases. Alpha releases are intended to make it easier to test the current state of new features and bug fixes and to test the release process. During the alpha phase, features may be added up until the start of the beta phase (2020-05-18) and, if necessary, may be modified or deleted up until the release candidate phase (2020-08-10). Please keep in mind that this is a preview release and its use is not recommended for production environments.

  • Weekly Python StackOverflow Report: (ccxii) stackoverflow python report
  • Perl Weekly Challenge 044: One Hundred, Two Hundred

    We can populate each place “between digits” with one of three possible values: a plus sign, minus sign, or nothing. To check all the possible permutations, we’ll use an indicator function similarly to The Knapsack Problem. In this case, though, there are three possible values, so we need to loop over numbers in the ternary numeral system.

    The only operation we’ll need will be the increment, so we don’t need the full support for arithmetic in base 3. We can implement the increment ourselves: we start from the right of the number, change any 2 into 0 and move left. Once we find 0 or 1, we increment it and we’re done.

    To create the expression, we just need to intersperse the digits with the operators. See the apply subroutine below.

    To evaluate the expression, we won’t use eval, as we don’t want to introduce security problems into our code. As the operations are just addition and subtraction, we can transform the expression into a large sum of positive and negative numbers (the latter correspond to the numbers being subtracted). We’ll use a regexp match to split the expression.

  • Confessions of a Recovering Proprietary Programmer, Part XVII

    One of the gatherings I attended last year featured a young man asking if anyone felt comfortable doing git rebase “without adult supervision”, as he put it. He seemed as surprised to see anyone answer in the affirmative as I was to see only a very few people so answer. This seems to me to be a suboptimal state of affairs, and thus this post describes how you, too, can learn to become comfortable doing git rebase “without adult supervision”.

    [...]

    Fortunately, one of my colleagues pointed me at tig, which provides a dynamic ASCII-art display of the selected commits. This is again not as good as gitk, but it is probably as good as it gets in a text-only environment.

    These tools do have their limits, and other techniques are required if you are actively rearranging more than a few hundred commits. If you are in that situation, you should look into the workflows used by high-level maintainers or by the -stable maintainer, who commonly wrangle many hundreds or even thousands of commits. Extreme numbers of commits will of course require significant automation, and many large-scale maintainers do in fact support their workflows with elaborate scripting.

    Doing advanced git work without being able to see what you are doing is about as much a recipe for success as chopping wood in the dark. So do yourself a favor and use tools that allow you to see what you are doing!

»

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.

More on Tux Machines: About ● Gallery ● Forum ● Blogs ● Search ● News ● RSS Feed

Part of Bytes Media ● Sister sites below.

TechBytes Techrights button

Powered by Drupal, an open source content management system

Content available under CC-BY-SA CC

© by original authors

Powered by CentOS 6.5 (GNU/Linux), Varnish, and Drupal 6