Language Selection

English French German Italian Portuguese Spanish

Programming Leftovers

Submitted by Roy Schestowitz on Thursday 13th of May 2021 11:44:50 PM Filed under
Development
  • Rust 2021 edition to arrive in October with 'more consistent panic' and other new features

    The Rust 2021 Edition Working Group has scheduled the new version for release in October, with what it says are small changes that amount to a significant improvement.

    This is the "third edition of the Rust language," said Mara Bos, founder and CTO of Fusion Engineering and a Rust Library Team member. The previous editions are Rust 2015 and Rust 2018.

    "Edition" is a special concept in Rust, as explained here. Updates to Rust ship frequently, but the special feature of an edition is that it can include incompatible changes. A crate (Rust term for a library) has to be explicitly configured to support an edition so older code will continue to work correctly. The Rust compiler can link crates of any edition.

  • 3 features released in Python 3.1 you should use in 2021

    This is the second in a series of articles about features that first appeared in a version of Python 3.x. Python 3.1 was first released in 2009, and even though it has been out for a long time, many of the features it introduced are underused and pretty cool. Here are three of them.

    [...]

    Python allows the -m flag to execute modules from the command line. Even some standard-library modules do something useful when they're executed; for example, python -m cgi is a CGI script that debugs the web server's CGI configuration.

    However, until Python 3.1, it was impossible to execute packages like this. Starting with Python 3.1, python -m package will execute the __main__ module in the package. This is a good place to put debug scripts or commands that are executed mostly with tools and do not need to be short.

    Python 3.0 was released over 11 years ago, but some of the features that first showed up in this release are cool—and underused. Add them to your toolkit if you haven't already.

  • Perl Weekly Challenge 112: Canonical Path and Climb Stairs
  • A Perl Community Dashboard | dean [blogs.perl.org]

    In this weeks TPF Marketing Committee meeting I made an elevator pitch for a "Perl Community Dashboard". It was well received so I have taken the action item to expound upon the idea here to gather more input. Understand this then as the minimum viable product to go from 0 to 1, something achievable that we can build upon.

  • Andy Wingo: cross-module inlining in guile

    Greetings, hackers of spaceship Earth! Today's missive is about cross-module inlining in Guile.

    a bit of history

    Back in the day... what am I saying? I always start these posts with loads of context. Probably you know it all already. 10 years ago, Guile's partial evaluation pass extended the macro-writer's bill of rights to Schemers of the Guile persuasion. This pass makes local function definitions free in many cases: if they should be inlined and constant-folded, you are confident that they will be. peval lets you write clear programs with well-factored code and still have good optimization.

    The peval pass did have a limitation, though, which wasn't its fault. In Guile, modules have historically been a first-order concept: modules are a kind of object with a hash table inside, which you build by mutating. I speak crassly but that's how it is. In such a world, it's hard to reason about top-level bindings: what module do they belong to? Could they ever be overridden? When you have a free reference to a, and there's a top-level definition of a in the current compilation unit, is that the a that's being referenced, or could it be something else? Could the binding be mutated in the future?

  • Jussi Pakkanen: .C as a file extension for C++ is not portable

    Some projects use .C as a file extension for C++ source code. This is ill-advised, because it is can't really be made to work automatically and reliably.

  • How WASI Makes Containerization More Efficient

    WebAssembly, or Wasm for brevity, is a standardized binary format that allows software written in any language to run without customizations on any platform, inside sandboxes or runtimes – that is virtual machines – at near native speed. Since those runtimes are isolated from their host environment, a WebAssembly System Interface (WASI) gives developers – who adopt Wasm exactly to be free to write software once, but ignoring where it will run – a single, standard way to call the low-level functions that are present on any platform.

    The previous article in this series describes the goals, design principles and architecture of WASI. This time, we present real-world, usable projects and services based on WASI, that also clarify its role in the big picture: to facilitate the containerization of virtually any application, much more efficiently than bulkier containers like Docker may do.

»

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