Vojtěch Káně

About

Mon, 01 Jan 0001 00:00:00 +0000

Hi, my name is Vojtěch Káně. I am a CS student proudly studying the Faculty of Mathematics and Physics of the Charles University.

Computer science is my passion. While being mainly a software person — I love coding, testing, automating etc., I also enjoy hacking hardware from time to time.

I believe in the power of community. I use a lot of open-source tools and I also try to give back as much as possible. I report and fix bugs, improve documentation, and answer questions in forums.

Contact me

Mon, 01 Jan 0001 00:00:00 +0000

No matter whether it is a blog post comment, a question, or possibly a job offer :), I am looking forward to hearing from you. Just write me an email at vojta001@vkane.cz, or contact me on Matrix @vojta001:vkane.cz.

If you’re into social networks, you can also follow me on the Fediverse (the protocol behind not only Mastodon) as @vojta001@vkane.cz.

Bus accident

Tue, 27 Oct 2026 14:27:25 +0100

My bus had an accident today. Nobody got injured as far as I can tell, but I got quite scared the moment we drove onto the sidewalk unexpectedly.

Side view

Front view

Unround tabs in Firefox Nova

Thu, 01 Oct 2026 10:20:48 +0200

I’ve just done a major system update and — BANG! — there is the new Firefox Nova. It’s not that far from the original and I got pretty used to the shades of my button changes every now and then. Not that I’d need this constant repainting in my life but whatever, such is the world now probably. But there is one thing that annoyed me so much – the extreme rounded corners of the tabs

pyinfra (Nick Mills-Barrett)

Thu, 03 Jul 2025 14:52:35 +0200

Give back useful documentation

Thu, 03 Jul 2025 11:29:49 +0200

Just dumping a quick mental meltdown here: Please, pretty please, can we go back to good old boring developers documentation style? I mean those terse articles presenting real new information? Those long walls of text that nobody ever wants to read, but ends up reading because they contain what one is looking for?

It doesn’t have to be so bad. There are well-written documentations that are a pleasure to read, but the core point is that they have to actually convey some facts. It might have just been a bad month for me, but I was confronted with too much screwed-up docs and I think it hadn’t been so bad in the past. I am afraid it is an inevitable consequence of replacing real humans with LLMs or simple machine generated garbage. Both of the recent instances were from Google, but I meet it just everywhere. The docs tell the obvious (“To assemble a car, you gotta get a wrench from your box. Beware there are two latches, if you only press one, the box won’t open preventing you from obtaining the wrench”) and pretend the rest is intuitive (which it often sort of is) ignoring the parts where one can honestly need to tweak some details (“Then put all parts where they fit. And if you get lost, ask our chat bot”).

Velvyslanectví Ukrajiny v České republice (Ukrainian embassy in Czech Republic)

Tue, 01 Apr 2025 16:39:47 +0200

I am not dead!

Sun, 30 Mar 2025 19:58:44 +0200

I’ve always dreamed about blogging, you know, sitting down revisiting my recent thoughts and presenting them in an organized way to the public. The problem is, I’ve always dreamed about so many things that finding time for any particular one was difficult if not impossible. It usually happens by chance that I get back to an old dream and push it a bit. It’s most often when I am sick and can’t take the regular duties. And guess what? I feel ill today. But that’s not the point here.

Honza Černý

Sun, 30 Mar 2025 19:29:40 +0200

Honza is my friend from university and a fellow organizer of KSP. He’s very into metal-ish music and he regularly posts about concerts he visits. Despite this, his most visited article is a collection of notes for the highschool maturita exam :)

Mozilla

Tue, 22 Feb 2022 12:16:35 +0100

Donating challenge for 2022

Mon, 24 Jan 2022 12:55:57 +0100

gnu.org states:

Free software is a matter of liberty, not price. To understand the concept, you should think of “free” as in “free speech”, not as in “free beer”.

Yes, sure, free software is a matter of liberty, but that doesn’t mean it doesn’t cost anything to create it. Right. Some actual money for the servers and most importantly, for the developers. There is tons of free software out there (and in the broader sense, free content, like Wikipedia) and most of it is a passion project of a well-employed nerd with just a few users, so everything is all right.

git annex (Joey Hess)

Sat, 15 Jan 2022 12:36:55 +0100

Sijisu

Mon, 15 Nov 2021 12:36:55 +0100

Sijisu, AKA Šimon, is another of the core Pátek members. He is the speak less, say more kind of person, so you want to make sure you always fully concentrate when he’s talking, as it is always valuable. He excels at cybersec; every time he starts his deadly dance with a poor corporate website, you know a leak is about to happen (followed by a responsible dislosure of course).

Greenscreener

Mon, 15 Nov 2021 09:02:09 +0100

Honza, the Greenscreener, is one of my best friends of the physical world. He is, just like me, a crazy computer science guy whose sleep balance looks like the stock market during the Great Depression. The cool part is he can do some art-ish things as well; he plays the guitar, designs logos and more. Why do all my drawing attempts end up with ugly stickmen?

Improving detailed prints by changing perimeters count

Tue, 13 Jul 2021 22:49:50 +0200

I have been printing lots of different badges and other finely detailed objects with no requirements on mechanical properties. They seem to be super easy at first as they are all flat with no overhangs and with only simple bridging. That’s all great, but there is a tough part: every minor failure is visible and unfixable. Sculptures can be post-processed with a sharp knife and sandpaper, but badges only get uglier and uglier. It is therefore crucial to slice the models in a way the printer cannot make it wrong.

Pátek Show Controller

Tue, 01 Jun 2021 16:35:44 +0200

Pátek Show Controller, PSC, or P8 are names of my, and some other members’ of Pátek, device capable of controlling lights, music, special effects and other stage equipment. Our main goal was to make it as user-friendly as possible while keeping powerful tunables for experts. We won atthack 2019 in Brno with the idea and have been working on it since then. The pace isn’t very fast as we are all busy students, but the project is far from being dead.

Tinyquiz

Tue, 01 Jun 2021 16:16:59 +0200

Tinyquiz is an open-source online quiz platform I wrote as a semester programming project for the Programming I course. It is inspired by Kahoot, but does not require anyone to sign up (including the organizer) and can be easily self-hosted.

Kev Quirk's blog

Tue, 25 May 2021 19:42:57 +0200

Kev Quirk’s blog was one of the sources of inspiration for my one especially by encouraging to write a lot and not to fear imperfections. He is the author of #100DaysToOffload.

What? A blog?

Tue, 25 May 2021 14:17:27 +0200

Yes! This is not a personal diary to be filled with fears and desires from the bottom of my heart, this is (or will be) a collection of technical notes, opinions, and dead ends I have discovered during my computer science adventures.

The internet is already full of high-quality content, so why make another? Because the world is a complex place with so many variables and pitfalls, so while my posts might not be the most accurate or the most detailed, they might match the situation of the readers and therefore be helpful. I have read many articles showing the obvious, but without them, I would have never realized.