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Programming Leftovers

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Development
  • #28 PrintScrn · This Week in GNOME

    Update on what happened across the GNOME project in the week from January 21 to January 28.

  • Implementing a MIME database in XXXX

    Recently, I have been working on implementing a parser for media types (commonly called MIME types) and a database which maps media types to file extensions and vice-versa. I thought this would be an interesting module to blog about, given that it’s only about 250 lines of code, does something useful and interesting, and demonstrates a few interesting xxxx concepts.

    The format for media types is more-or-less defined by RFC 2045, specifically section 5.1. The specification is not great. The grammar shown here is copied and pasted from parts of larger grammars in older RFCs, RFCs which are equally poorly defined. For example, the quoted-string nonterminal is never defined here, but instead comes from RFC 822, which defines it but also states that it can be “folded”, which technically makes the following a valid Media Type:

    text/plain;charset="hello
     world"
    

    Or so I would presume, but the qtext terminal “cannot include CR”, which is the mechanism by which folding is performed in the first place, and… bleh. Let’s just implement a “reasonable subset” of the spec instead and side-step the whole folding issue.1 This post will first cover parsing media types, then address our second goal: providing a database which maps media types to file extensions and vice versa.

  • gst-editing-services compiled in OE

    I discovered that 'gst-editing-services' is another dependency of Pitivi, added to these:
    https://bkhome.org/news/202201/more-dependencies-for-pitivi-video-editor.html
    There is no recipe in OE, so I attempted to compile it on the host system. Stuffed around for about 3 hours, unable to compile, ninja is doing something stupid.

  • More dependencies for Pitivi video editor

    This morning I posted about a complete recompile in OpenEmbedded, "revision 7":

    https://bkhome.org/news/202201/what-to-expect-in-the-next-release-of-easyos.html

    This included bumped gstreamer version, suitable to run Pitivi.

  • Wasmer 2.2 Bringing Its WebAssembly "Singlepass" Compiler To AArch64 - Phoronix

    Wasmer 2.2-rc1 is out today as the WebAssembly run-tme to "run any code on any client" with its broad platform coverage and allowing numerous programming languages from Rust to PHP to C# being able to be compiled into WebAssembly and then running on any OS or embedded into other languages for execution.

    Wasmer continues as one of the leading open-source WebAssembly runtimes with a diverse feature-set. Its project site at Wasmer.io talks up Wasmer for use from "supercharged blockchain infrastructure" to "portable ML/AI applications". Buzzwords aside, Wasmer has been a very interesting WebAssembly open-source project.

  • Alternatives to Visual Basic

    This is a list of free/libre open source software (FLOSS) alternatives to Visual Basic (part of Microsoft Visual Studio) computer programming platform. If your school is still teaching VB 6, or if you now use Ubuntu for programming classroom, we strongly suggest you to switch to either one of these alternatives. With these, one can create computer programs visually by drag and drop as well as coding just like what one can do with VB.

More in Tux Machines

today's howtos

  • How to Connect Wi-Fi using Nmcli in Linux

    Why use the Network-command-line Manager’s interface? Sometimes Ubuntu Network Manager behaves strangely, and you may be unable to connect to any Wi-Fi Hotspot using the GUI (Graphical user interface). The Network Manager may fail to start, and even after manually restarting the service through the terminal, you may still have difficulties connecting to any Wi-Fi Hotspot, even a previously recognized and stored home network. I encountered same problem on dual boot configurations and standalone Linux installs, and it was quite inconvenient, particularly during the WFH (Work from home) phase that we’re all going through.

  • How to Add Comments to UFW Rules

    In an earlier article we discussed how to add comments to iptables rules for clarity and documentation. In our opinion it is a good practice to comment anything someone else may have to work on in the future. Using comments in scripting is a common practice for good reason. We decided to write a quick tip on how to add a comment to UFW (Uncomplicated Firewall) rules. I am not a huge fan of UFW or Firewalld. In my opinion they make managing netfilter harder, not easier. That is because I started using iptables over 20 years ago. I am very comfortable with it and tend to know the necessary syntax off the top of my head. That being said, adding a comment to UFW rules is much more intuitive than any other iptables front end.

  • How to Install Drupal 9 on Ubuntu 22.04 - LinuxTuto

    Drupal is an open-source and popular content management tool that is the foundation of many websites across the internet. It has great standard features, like easy content authoring, reliable performance, and excellent security. Flexibility and modularity are some of the core principles that set it apart from the rest. In this tutorial, we will show you how to install Drupal 9 on your Ubuntu 22.04 OS.

  • How to migrate from Blogger to WordPress

    Blogger.com, as its name suggest is a blog service. Is very popular and it’s owned by google. You may want to take full control of your blog by setting up a WordPress on your server. But you still need your content: in this entry I’ll show you how to migrate from blogger to wordpress. I’m assuming you already have a brand new WordPress installation. If not, here on unixcop.com we have several articles about wordpress.

  • How to install Inkscape 1.2 on a Chromebook

    Today we are looking at how to install Inkscape 1.2 on a Chromebook. Please follow the video/audio guide as a tutorial where we explain the process step by step and use the commands below.

  • What is AWS CloudTrail and how to use it

The 10 Best Linux Apps for Musicians

If you're a musician of any kind, from beginner to professional, Linux provides an amazing assortment of free, yet powerful, platforms and applications that will boost your productivity and help you to show off your creativity. Don't let the fact that these apps are free wrongly influence your judgment. They are high-quality, professional-grade applications that rival even the most well-known, high-priced, commercial applications. These are 10 of the best Linux apps for musicians of all levels. Read more

GNOME and KDE: This Week in GNOME, Qt6 and KF6

  • #44 Five Across · This Week in GNOME

    Update on what happened across the GNOME project in the week from May 13 to May 20.

  • Okteta making a small step to Qt6 | Attracted by virtual constructs

    Old, but stable, even more in when it comes to the feature set, and still getting its polishing now and then: your simple editor for the raw data of files, named Okteta. What started in 2003 as a hex editing widget library for KDE3 (and Qt3), of course named KHexEdit (to be confused with the unrelated hex editor program that was part of KDE at that time), it turned into a first dedicated application by the title Okteta during the years 2006 to 2008 for KDE4 (and Qt4). From there on a small set of features was added once in a while, most impressively Alexander Richardson’s Structures tool in 2010,. Until then in 2013 the port to Qt5/KF5 was done (also to a good degree by Alexander). After that things had settled, the program working properly when needed, otherwise just left in the corner of the storage. Now, nearly 2 decades after the first lines were written, the next port is to be done, to Qt6 and KF6. And this time the actual port is just amazingly boring: changing a few “Qt5” to “Qt6” in the buildsystem (and later some “KF5” to “KF6” once KF6 is ready), adding Qt6::Core5Compat as helper library for 1-2 classes that had not yet been substituted, adding a “const” to the argument of an overridden virtual method, adapting some “QStringList” forward declarations… and done.

The 5 best Application Launchers for Ubuntu

Every operating system comes with an application launcher where you have to mouse over the entire menu to launch an application. But, unlike other operating systems, Linux allows us to install other launchers as an alternative. In this post, We came up with the five best application launchers for Ubuntu and their installation process. Ubuntu has a default application launcher, i.e., GNOME Shell application overview. If you are a beginner or a tech professional, browsing the entire menu to launch an application is quite bothersome. Linux community offers a wide variety of application launchers. From a rich UX-based to a bare minimum, Linux has everything to offer. These application launchers offer many themes and come with a lot of customization. Choosing the right application launcher as per your need might be difficult. That’s why we came up with the five best application launchers. Here are the top 5 application launchers for your Ubuntu. Read more