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Programming Leftovers

Submitted by Roy Schestowitz on Tuesday 3rd of November 2020 11:14:58 AM Filed under
Development
  • Inheritance in PHP – Linux Hint

    The three main features of object-oriented programming include Encapsulation, Inheritance, and Polymorphism. When programming, you may need to use certain code multiple times, and using inheritance reduces the repetition of rewriting code manually by reusing the code. Inheritance is a method for creating a new class by inheriting a base class. The object of the new class will be able to access all class members of the new class, as well as the base class, through inheritance. In this way, the same code can be reused many times by writing it only one time. PHP uses the extend keyword for inheritance. This tutorial shows how to implement inheritance using PHP script.

  • RcppSimdJson 0.1.2: New Upstream, New Utilities

    A new RcppSimdJson release arrived on CRAN late yesterday bringing along the one recently updated simdjson release 0.6.0.

    RcppSimdJson wraps the fantastic and genuinely impressive simdjson library by Daniel Lemire and collaborators. Via very clever algorithmic engineering to obtain largely branch-free code, coupled with modern C++ and newer compiler instructions, it results in parsing gigabytes of JSON parsed per second which is quite mindboggling. The best-case performance is ‘faster than CPU speed’ as use of parallel SIMD instructions and careful branch avoidance can lead to less than one cpu cycle per byte parsed; see the video of the talk by Daniel Lemire at QCon (also voted best talk).

    Other than the upstream update, Brendan added some new utilities to check for valid utf-8 or json format, and to minify json plus a small workaround for a clang-9 bug we encountered. We can confirm Daniel’s statement on ridiculously fast utf-8 validattion. It is so cool to work with amazing tools.

  • Nibble Stew: You wanted Boost via Meson subprojects? You got it! (sorta)

    In the previous blog post we saw a way to build SDL transparently as a Meson subproject. In the discussion that followed I got a question on whether you could consume Boost in the same way. This is an interesting question, because Boost is a, let's say, challenging dependency. It is very big and set up in an unusual way. As an example I would estimate that the single fact that they don't ship Pkg-Config files has cost Meson developers tens of hours of unnecessary troubleshooting. Having something simpler and more reliable would be welcome.

    To test this out I created an MVP program that uses Boost's flat map from the container library and then added dependencies until it worked. The actual code can be downloaded here (tested on Linux, VS and Mac).

  • Perl Weekly Challenge 085

    The latest installment of the Perl Weekly Challenge just dropped so I thought I would take a crack at it. Please note that the challenge is still currently open (as of date of publishing) in case you are participating.

  • 2020.44 Comma Comma

    Jonathan Worthington has just announced the 2020.10 release of Comma, the IDE of choice for the Raku Programming Language. And this release comes with an impressive amount of new features and even direct support for Red, the Raku ORM!

  • Create a PyTorch Docker image ready for production

    A tutorial on how to use Torch Serve to create a production-ready Docker image with your model integrated

  • Riccardo Padovani: A gentle guide to deploy a PyTorch model in production over AWS ECS with CI/CD.

    Your team has provided you a PyTorch model, and they have asked you to make it available online, so their magic can be used all around the world! How to do so?

    In this three parts tutorial we will see how to deploy such a model on AWS ECS, discussing different approaches, which technologies are available and what are our options. We will gather some best practices, based on real word experience in deploying models to production.

    The first tutorial is about how to properly package the model inside a Docker image thanks to PyTorch Serve. While it is not a hard task, there are some tricks and optimizations that are worth sharing, to make the Docker image as small as possible, and to make it faster to build.

  • sphinxcontrib-spelling 7.0.1 – Doug Hellmann

    sphinxcontrib-spelling is a spelling checker for Sphinx-based documentation. It uses PyEnchant to produce a report showing misspelled words.

  • JavaScript onClick – Linux Hint

    JavaScript is a well-known programming language. It is used in more than 95% of the websites we interact with daily. You may often see that on the click of a button, a whole page gets changed, a form field is opened, or a pop-up box appears. From the perspective of a programmer/developer, how can we implement such functionality and handle the website’s interactions with users? When it comes to interaction, JavaScript provides built-in functions to control events on a site.

  • 4 reasons why JavaScript is so popular

    ECMAScript is the standardized version of JavaScript as well as an open standard language. Companies can use ECMAScript to create a JavaScript implementation. According to Wikipedia, "an ECMAScript engine is a program that executes source code written in a version of the ECMAScript language standard, for example, JavaScript." The most popular engines, V8 and SpiderMonkey, are open source projects.

    JavaScript has been around for 25 years and has a vast community behind it. A developer is spoiled for choice. The community has built so many plugins and frameworks that the phrase "framework fatigue" was coined.

»

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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.

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