Akos.ma
Adrian Kosmaczewski
Adrian Kosmaczewski is a software expert with over 28 years of experience, currently working as Senior Architect for Red Hat. He is a published author, trainer, and speaker. He has written many books about software development and has shipped cloud, mobile, and desktop apps since 1996. Adrian holds a Master in Information Technology from the University of Liverpool.
August 2026
September 2026
October 2026
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All posts (62)
In an earlier article I solved a 3x3 system by elimination; here is the same system written with matrices and solved by row reduction on the augmented matrix. $$ \begin{cases} x + y + z = 6 \\ 2x - y + z = 3 \\ 3x + 2y - z = 4 \end{cases} $$The same information fits into one matrix equation \(A\mathbf{x} =...
The other day I came across this reel on Instagram (in Spanish) about a UFO (or “OVNI” according to the Spanish acronym) that flew over Buenos Aires on Tuesday, September 17th, 1985. View this post on Instagram What’s funny is that I remember seeing this object distinctively. I was in sixth grade of school, and had...
In the 2009, extraordinary Oscar-winning Argentine crime drama “The Secret in Their Eyes”, there’s a memorable scene (one of many, actually) driven by Mario Alarcón, who plays the role of judge Raimundo Fortuna-Lacalle. At the end of that scene, visible on YouTube, judge Fortuna-Lacalle stands next to Pablo Sandoval...
A few months ago I wrote an article on De Programmatica Ipsum about Keza MacDonald’s awesome book “Super Nintendo: The Game-Changing Company That Unlocked the Power of Play”, and as I was reading the book I took some notes; here they go, in their entirety, and without any editing, and with the page numbers appended...
When I was a kid, while my mom worked in downtown Buenos Aires, my grandmother Herta would greet me every day at her appartment in the 8th floor above Vicente López after school (back in those days I only had classes in the mornings) and prepare my lunch; she would then go for a nap or to watch some telenovela,...
The year is 2000 or 2001. Argentine comedian Alfredo Casero, known in the country for a quite revolutionary comedy show on TV called “Cha Cha Cha”, which aired in the early 90’s, went to a Japanese restaurant to eat some sushi, a dish that had just arrived to the country and was the latest culinary hype. In between...
On Friday, August 30th, 1996, I published a message on the “soc.culture.argentina” Usenet newsgroup, announcing the existence of a new page on this thing called “the web”: the URL was http://sc2a.unige.ch/~kosmacze and it was my first personal website. That URL does not exist anymore, and sadly the Internet Archive...
In a previous post I talked about WezTerm, a cross-platform terminal emulator application written in Rust that I liked. This time I’m going to talk about another one written in Zig called Ghostty, and I like this one even more. Ghostty is yet another brainchild of Mitchell Hashimoto, of HashiCorp fame. The...
You can configure your Hugo website to automatically embed an image into a web page as a Base64 string; this post shows you how. Let’s assume your Markdown posts have this structure: --- title: 'Some Title' author: 'Jane Smith' excerpt: 'Blah blah…' slug: some-title image: some-title.jpg --- This is my article… Then...
I’ve added the possibility of generating Asciidoctor-style admonitions to this website, not only in the final HTML generated for this website, but also in the PDF and EPUB outputs, and you might have seen them in action in previous posts. In Asciidoctor and Antora I liked to use such highlighted blocks, to showcase...
Last year I talked about my faithful Logitech C930e webcam, and at the end of the article I mentioned that I have to manually disable the autofocus, and that sadly that setting is gone at every reboot, and even every time I unplug the webcam; my question then was, can I automate this somehow? And the answer is yes,...
In Argentina we like to tell this urban legend that is somehow kind-of-true, that the ballpoint pen was invented there, thanks to the idea of a Hungarian-born man called László Bíró who moved to Argentina at some point during World War II. This story is not entirely true in the sense that when Bíró came to Argentina...
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