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Programming Leftovers

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  • C++ Coroutines Two: Electric Boogaloo: co_await a QNetworkReply*

    If you haven't read my previous blog post on coroutines in C++, you want to do that before reading this blog post.

    In the last blog post, I explained how to construct an awaitable Future type.


    As far as the C++ compiler is concerned, this ain't kosher, because you're trying to define an operator for a primitive type (a pointer). Your compiler will probably tell you that this needs to be done on a class or enum type.

    But that leaves the question of “how do I make a QNetworkReply* co_awaitable if I can't define co_await on a pointer type?” It is possible.

    Your promise_type object has more last jobs than what I covered in the last blog post. One of them is to potentially provide an await_transform function.

    An await_transform function essentially “preprocesses” any values being co_awaited before the compiler attempts to look for a co_await implementation.

  • Modula-2 Programming Language Front-End Still Looking Towards Mainline GCC In 2021 - Phoronix

    The Modula-2 programming language developed from the late 70's to 80's might finally see mainline GNU Compiler Collection (GCC) support in 2021.

    The structured Modula-2 programming language is that out of ETH Zurich by Niklaus Wirth who is known for his work as well on Euler, Pascal and other programming languages. Modula-2 still has some uses today like with Russia's GLONASS satellites.

  • Remi Collet: PHP version 7.4.21RC1 and 8.0.8RC1

    Release Candidate versions are available in testing repository for Fedora and Enterprise Linux (RHEL / CentOS) to allow more people to test them. They are available as Software Collections, for a parallel installation, perfect solution for such tests, and also as base packages.

    RPM of PHP version 8.0.8RC1 are available as SCL in remi-test repository and as base packages in the remi-php80-test repository for Fedora 32-34 and Enterprise Linux.

    RPM of PHP version 7.4.21RC1 are available as SCL in remi-test repository and as base packages in the remi-test repository for Fedora 32-34 or remi-php74-test repository for Enterprise Linux.

  • Commercial LTS Qt 5.15.5 Released
  • gfldex: Despotting

    API::Discord is a bit spotty. Many classes that are typically represented as a Str don’t sport that method. In same cases bare deparsed JSON is returned. That led to a fair amount of clutter that followed a pattern. After making a remote call via the API, I mix in a role and query the API further, before passing a list on via a Supply. I do the same operation with different operants. That’s sounds like a candidate for a multi sub.

  • Bankdata shares its results of using Quarkus on Red Hat OpenShift Container Platform

    Organizations across the globe and spanning various industries are turning to containerized microservices to innovate at speed. Many have adopted Red Hat OpenShift as a robust and highly-scalable enterprise-ready platform for hosting their containers.

    There are so many Java frameworks available. Deciding which to use when developing on Red Hat OpenShift can be pretty challenging for developers. After all, the business needs the applications it relies on to run efficiently and to be able to scale up quickly when required.

    This post compares how well three different Java frameworks – specifically Spring Boot, the community build of Quarkus on JVM, and the community build of Quarkus as a native Linux executable – optimized Java for Red Hat OpenShift. We’re going to be looking at an experiment Bankdata conducted last year.

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.