Everlasting student · Rails Core · Zeitwerk · Freelance · Life loverhttps://bsky.app/profile/fxn.bsky.socialhttps://bsky.app/profile/fxn.bsky.social/post/3mp2ss5d5bs26We just watched "Marguerite's Theorem" in Prime Video. The most realistic math film I have seen, the blackboards, the jargon, the nerdiness (she absolutely nails it), ..., really recommended. https://www.imdb.com/title/tt26699529/24 Jun 2026 21:02 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mp2ss5d5bs26https://bsky.app/profile/fxn.bsky.social/post/3mo2zhnfc6c2wWitnessing the total solar eclipse from a cruise ship, out at sea somewhere between Mallorca and Ibiza. That’s the plan12 Jun 2026 05:36 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mo2zhnfc6c2whttps://bsky.app/profile/fxn.bsky.social/post/3mm527fmip22rZeitwerk 2.8 is out, with a new way to define namespaces. Given loader.nsfile = 'ns.rb' self-contained components can define their namespace inside their folder: my_component/ns.rb # MyComponent my_component/widget.rb # MyComponent::Widget More details in https://github.com/fxn/zeitwerk#explicit-namespaces-defined-in-nsfiles18 May 2026 14:04 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mm527fmip22rhttps://bsky.app/profile/fxn.bsky.social/post/3mlwqwf4bo224This guy's channel is hilarious https://www.youtube.com/watch?v=juHv_Vi4giU16 May 2026 02:02 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mlwqwf4bo224https://bsky.app/profile/fxn.bsky.social/post/3mkqfqds3pc2kNow that nobody writes code by hand anymore, I'm going to try to work on my mythical book about constants in Ruby, out of love for the craft, and just to go against the grain! OK, maybe I should publish a Markdown version you can feed to your agent 😂.30 Apr 2026 20:01 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mkqfqds3pc2khttps://bsky.app/profile/fxn.bsky.social/post/3mk5nxjztoc2vToday, we celebrate the Diada de Sant Jordi in Catalonia. Men give roses to women, and women give books to men. (I give both roses and books to women.) It is a very nice and colorful day. Streets are full with stalls and people enjoying, buying books and flowers.23 Apr 2026 09:07 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mk5nxjztoc2vhttps://bsky.app/profile/fxn.bsky.social/post/3mjlu5vfnec2ySome reflections about not taking software errors for granted in my keynote of EuRuKo 2024: https://www.youtube.com/watch?v=sUhElM03QB4&t=2200s16 Apr 2026 07:10 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mjlu5vfnec2yhttps://bsky.app/profile/fxn.bsky.social/post/3mjgpnaxqm22iIn general, I am not a fan of callable interfaces in Ruby. There are several reasons, and one of them is that the interface is `call`: service.call(params) My issue with that is that "calling" is what the caller does, not what the object does.14 Apr 2026 06:06 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mjgpnaxqm22ihttps://bsky.app/profile/fxn.bsky.social/post/3mjc4ar3r2c2oI just saw the incomparable Michael McDonald published a memoir a couple of years ago. On its way! That's the music section of my library.12 Apr 2026 10:08 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mjc4ar3r2c2ohttps://bsky.app/profile/fxn.bsky.social/post/3mj3273pp2s2sAll these semicolons disprove LLMs just pick words from _existing_ training data. Think about it.09 Apr 2026 14:43 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mj3273pp2s2shttps://bsky.app/profile/fxn.bsky.social/post/3miopy7zxkk2eMy daughter, who is into genetics, loved the logo of Helix. That's all I need, installing.04 Apr 2026 17:08 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3miopy7zxkk2ehttps://bsky.app/profile/fxn.bsky.social/post/3mij2p3aocs24Do you know that feeling some people have, I'm done, now I have to write tests? now I have to write docs? I believe that is going downhill with AI. Now, for some, _understanding_ has friction. People generate code, PRs, peers the review. And *owning* any of that starts to feel costly for some.02 Apr 2026 11:04 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mij2p3aocs24https://bsky.app/profile/fxn.bsky.social/post/3mhiev2eibk2tTIL that Newton already predicted light bends with gravity (not a physicist!). What GR predicted was a different magnitude (2X). I am reading "Proving Einstein Right", which explains all it took to verify that in the early 1900s.20 Mar 2026 11:08 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mhiev2eibk2thttps://bsky.app/profile/fxn.bsky.social/post/3mhd6vsdc5k2pPlease, excuse me for interrupting your pre-apocalyptic AI timeline. I have the analog and mundane fact to share that I am letting my hair grow, and updated my avatar accordingly. I don't know yet up to which length or shape it is going to be, but that was my profile pic in CPAN, just saying.18 Mar 2026 09:38 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mhd6vsdc5k2phttps://bsky.app/profile/fxn.bsky.social/post/3mgxqk5og2226I congratulated Claude on a patch, they said it had been very satisfactory to have solved one specific tricky part of the solution. The singularity is around the corner my friends.13 Mar 2026 20:22 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mgxqk5og2226https://bsky.app/profile/fxn.bsky.social/post/3mgiq4mkotc2aThe CasNum in HN implements what's called "constructible numbers" in math. You study them, and together with some field theory, you are able to see that the classic Greek problems that remained unsolved for hundreds of years (like squaring the circle) are impossible. That was 19th century math.07 Mar 2026 21:04 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mgiq4mkotc2ahttps://bsky.app/profile/fxn.bsky.social/post/3mgd4sab2x22vJust realized the halting problem is decidable for functional programs 😂05 Mar 2026 15:35 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mgd4sab2x22vhttps://bsky.app/profile/fxn.bsky.social/post/3mgcm4yg3x22gI also struggle with this, and not only in OSS. Who I am talking to? Who deserves the credit? Because you can use an agent as a tool to speed you up, still having full agency about what is going on, but a different thing is talking to someone that has not made the effort to understand the problem. [contains quote post or other embedded content]05 Mar 2026 10:37 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mgcm4yg3x22ghttps://bsky.app/profile/fxn.bsky.social/post/3mg6eby6aus2uGasp, got my first smartwatch 😅03 Mar 2026 18:06 +0000at://did:plc:dbfb7k4eiwvy6pomjvexsief/app.bsky.feed.post/3mg6eby6aus2u