Hacker News: lukasgelbmann

New comment by lukasgelbmann in "Ask HN: What are you working on? (June 2026)"

lukasgelbmann — Sun, 14 Jun 2026 18:03:20 +0000

I’m working on a time series management & analysis tool. The goal is to provide simple ways to work with time series data, including an API and visualisation.

https://28times.com

New comment by lukasgelbmann in "Bttf is a command line datetime Swiss army knife"

lukasgelbmann — Thu, 28 May 2026 18:44:05 +0000

> “If you run this on a big repository, it will take quite a lot of time because `git log -n1` takes a long time. I think this is the fastest way to get the most recent commit time on a single file? (That's the assertion that I hope someone can correct me on!) In any case, `bttf tag exec` is using parallelism under the hood to make this even faster.”

Instead of running `git log -n1` on every file, I think you can walk through the commits backwards, skipping any files that have been seen. Something like this (these two commands could be followed by bttf commands):

  git log --pretty=format:"DATE:%aI" --name-only |
  awk '/^DATE:/ {date=substr($0, 6); next} $0!="" && !seen[$0]++ {print date, $0}'

This seems to run much faster. The only problem is it'll include files that have been renamed or removed. I got an AI to fix that too, but it starts getting awkward (still fast though!):

  git ls-files |
  awk '
    # Read all existing files from git ls-files into an array
    NR==FNR { lsfiles[$0]; next }

    # Process the git log stream
    /^DATE:/ { date=substr($0, 6); next }
    $0!="" && ($0 in lsfiles) && !seen[$0]++ { print date, $0 }
  ' - <(git log --pretty=format:"DATE:%aI" --name-only)

What types of exceptions should you catch?

lukasgelbmann — Thu, 28 May 2026 15:25:40 +0000

Article URL: https://www.pythonmorsels.com/what-types-of-exceptions-should-you-catch/

Comments URL: https://news.ycombinator.com/item?id=48310337

Points: 3

# Comments: 0

New comment by lukasgelbmann in "If more than 50% press blue, everyone survives. Red pressers always survive"

lukasgelbmann — Sun, 26 Apr 2026 20:02:02 +0000

With 3, especially if the animals outnumber humans, you’d first want to do some research into animal psychology to see whether red or blue has an edge for animals.

New comment by lukasgelbmann in "If more than 50% press blue, everyone survives. Red pressers always survive"

lukasgelbmann — Sun, 26 Apr 2026 19:45:56 +0000

There’s a moral benefit to choosing blue if you think there’s a chance that the end result will be split 50-50 and you’ll be the deciding vote between a blue majority and a red majority.

New comment by lukasgelbmann in "An AI agent deleted our production database. The agent's confession is below"

lukasgelbmann — Sun, 26 Apr 2026 19:36:55 +0000

If you’re using a model, it’s your responsibility to make sure the probability actually is that small. Realistically, you do that by not giving the model access to any of your bloody prod API keys.

New comment by lukasgelbmann in "GitHub's fake star economy"

lukasgelbmann — Mon, 20 Apr 2026 13:30:02 +0000

That’s not something I wanted to imply. It can also stand for "the fine article". Is there a better shorthand for "the article linked at top of the page" / "the original article"?

New comment by lukasgelbmann in "GitHub's fake star economy"

lukasgelbmann — Mon, 20 Apr 2026 12:14:58 +0000

I use stars to try and protect myself from dependency confusion attacks.

For example, let’s say I want to run some piece of software that I’ve heard about, and let’s say I trust that the software isn’t malware because of its reputation.

Most of the time, I’d be installing the software from somewhere that’s not GitHub. A lot of package managers will let anyone upload malware with a name that’s very similar to the software I’m looking for, designed to fool people like me. I need to defend against that. If I can find a GitHub repo that has a ton of stars, I can generally assume that it’s the software I’m looking for, and not a fake imitator, and I can therefore trust the installation instructions in its readme.

Except this is also not 100% safe, because as mentioned in TFA, stars can be bought.

How a cat debugged Stable Diffusion (2023)

lukasgelbmann — Sun, 08 Feb 2026 14:49:12 +0000

Article URL: https://blog.dwac.dev/posts/cat-debugging/

Comments URL: https://news.ycombinator.com/item?id=46934659

Points: 59

# Comments: 12

Designing a Programming Language to Speedrun Advent of Code (2023)

lukasgelbmann — Tue, 16 Dec 2025 20:43:37 +0000

Article URL: https://blog.vero.site/post/noulith

Comments URL: https://news.ycombinator.com/item?id=46294166

Points: 1

# Comments: 0

Europe's Erasmus founder Sofia Corradi dies, aged 91

lukasgelbmann — Sun, 19 Oct 2025 10:47:36 +0000

Article URL: https://www.thelocal.com/20251019/europes-erasmus-founder-sofia-corradi-dies-aged-91

Comments URL: https://news.ycombinator.com/item?id=45633348

Points: 3

# Comments: 0

New comment by lukasgelbmann in "No_color: Disabling ANSI color output by default"

lukasgelbmann — Tue, 07 Oct 2025 10:14:03 +0000

Does NO_COLOR=1 mean that all ANSI formatting should be disabled? Including bold text, italic text, and so on?

It seems that different software handles that question in different ways.

Const and Static Const Arrays in C and C++ (2022)

lukasgelbmann — Sat, 15 Mar 2025 08:49:02 +0000

Article URL: https://www.hahnjo.de/blog/2022/10/30/static-const-arrays.html

Comments URL: https://news.ycombinator.com/item?id=43371066

Points: 3

# Comments: 0

Fortune(6) – Linux Man Page

lukasgelbmann — Mon, 24 Feb 2025 11:01:03 +0000

Article URL: https://linux.die.net/man/6/fortune

Comments URL: https://news.ycombinator.com/item?id=43158139

Points: 41

# Comments: 17

Sequencing your DNA with a USB dongle and open source code (2021)

lukasgelbmann — Tue, 11 Feb 2025 17:41:01 +0000

Article URL: https://stackoverflow.blog/2021/12/24/sequencing-your-dna-with-a-usb-dongle-and-open-source-code/

Comments URL: https://news.ycombinator.com/item?id=43015671

Points: 1

# Comments: 0

Basel has to buy domain name in the Bahamas after mishap

lukasgelbmann — Fri, 31 Jan 2025 05:48:21 +0000

Article URL: https://www.bluewin.ch/en/news/switzerland/basel-has-to-buy-internet-address-in-bahamas-after-breakdown-2541936.html

Comments URL: https://news.ycombinator.com/item?id=42885008

Points: 67

# Comments: 54

Raising of Chicago

lukasgelbmann — Mon, 06 Jan 2025 16:31:27 +0000

Article URL: https://en.wikipedia.org/wiki/Raising_of_Chicago

Comments URL: https://news.ycombinator.com/item?id=42611978

Points: 82

# Comments: 41

Islands in lakes on islands in lakes on islands

lukasgelbmann — Sat, 19 Jun 2021 14:28:49 +0000

Article URL: https://en.wikipedia.org/wiki/Recursive_islands_and_lakes#Islands_in_lakes_on_islands_in_lakes_on_islands

Comments URL: https://news.ycombinator.com/item?id=27560697

Points: 13

# Comments: 0

New comment by lukasgelbmann in "Python strings are immutable, but only sometimes"

lukasgelbmann — Tue, 16 Feb 2021 01:47:07 +0000

Joining on a list (as in function two()) is no more memory intensive than joining on a generator expression (function one()). This is surprising at first. Raymond Hettinger has a very good explanation.[0] In short, it's because "".join() needs to iterate over the elements twice, and so it needs to store the whole sequence of string anyway.

[0] https://stackoverflow.com/a/9061024

New comment by lukasgelbmann in "An Innovative World Cup Stock Market Game"

lukasgelbmann — Sun, 10 Jun 2018 19:59:59 +0000

It's interesting that while the bookies unanimously have Brazil as favourites [0], this stock market game has Germany ahead of them [1]. It might be because Germany has easier opponents in the group stage.

[0] https://www.oddschecker.com/football/world-cup/winner

[1] https://prediction.zone/stockmarket2/worldcup2018/trading