I've made a fraction-based calculator, for simplifying rational expressions (written in ANSI-C using vi)

I was aiming to merge a scientific calculator with "bc", because I often need to simplify various fractions and whatnot. Quite happy with the result!

Uses shunting yard algorithm to evaluate the expressions, and a naive descent parser (I think?) to tokenise

Aside: OpenBSD's "editline" is very easy to use

Please ask any questions 😀

http://patpatpat.xyz/data/frac

#c #bsd #unix #math

📼 Command line video magic for ARTISTS

A cookbook by @madskjeldgaard for audio and video processing on the command line – with examples!

Includes how to generate a spectrum video from an audio file. How to combine an audio file and an image into a video. Among other things.

And it includes full #bash scripts and examples for for-loops, so you could do this on tons of audio files, if you so fancied 🤠

#ffmpeg #linux #unix #commandline #terminal #cli

https://hyaline.systems/blog/ffmpeg-for-artists

ffmpeg for artists: A cookbook for audio and video processing on the command line – with examples!

A guide to using ffmpeg for artists. ffmpeg is a free tool that allows you to create, convert and manipulate video, really quickly and without opening a heavy GUI-based program.

^{hyaline.systems}

You can learn more about #Plan9 through regular boot camps sponsored by the #SDF Public Access #Unix System! https://9p.sdf.org

#Plan9fromBellLabs #9front #RetroComputing #pubnix

Happy Birthday to Ken Thompson! 🎉 A tech legend who co-created UNIX, C, B, and Go. 💻 🔥

#opensource #unix

Who is this new stand up comedian ?

#linux #unix

Unix is often called the “father of operating systems” because it pioneered many fundamental concepts that became foundational for modern operating systems. Developed in the late 1960s and early 1970s at AT&T's Bell Labs, Unix introduced innovations that shaped the future of OS design.

#unix

While porting 'Space Travel' to the PDP-7, Ken Thompson developed an operating system that became the foundation of Unix. It played a crucial role in the development of Unix.

Happy 53rd birthday, Unix! 🥳

#unix #opensource

Here we go, @SDF comrades.

Got the background done, although I'm not 100% sold on what's on the screens. Also, thanks to @peron for a couple of those bits of line art.

Next on the to-do: character/terminal art for a few more characters. And yes, I think I need to get Milia in there, even though she's not a bridge operator.

#illustration #macross #unix #vt52

First the kids are trading #bash “#programming” best practices, now you’re pushing #nano power editing tips.

What’s next? “Theming #twm for fun and profit”?

Please help folks graduate from their Tinkertoys instead of helping them build teetering skyscrapers.

#Linux #Unix

Thanks Brodie, I love this video! From the good old times a few years into working at #Canonical. #CUPS already used by every distro for several years, but not all apps sent jobs in PDF format yet, several, like OpenOffice (predecessor of #LibreOffice) still sent PostScript, standard of old #Unix times. And printers still needed drivers and some manufacturers made (usually closed-source) ones, and everyone with an integration more awkward than the other ...

Happy Tuesday!

As 2024 marks the resurgence of RSS and Atom, I decided to update my rudimentary RSS tools from 2007 to make them contemporary and works under Python 3. The release v1.0 marks this step and allow everyone to use and improve the RSS toolset.

🔗 GitHub https://github.com/adulau/rss-tools

#rss #opensource #atom #open #rsstools #federated #unix