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Justus Perlwitz
Personal blog · justus.pw/posts · on HN as justuswprogrammingsecurity
Justus Perlwitz's personal blog at justus.pw covers programming and security. Since 2015, 4 different Hacker News readers have linked it 18 times, most often “Errors in J”. It is still writing: the last post was on 2026-10-31, and you can follow it by feed.
Landing page
Most-linked posts?
- Errors in J2 people · 3 mentions · first linked 2020-08-15
What Hacker News says?
In J, I think it's very difficult to move on from the initial stage of dealing with "line noise" as the author mentions. For me, this was further complicated by the fact that error messages are very hard to understand in the beginning. I've written an article that describes how I typically deal with solving most of the domain/rank/length errors: https://www.justus.pw/posts/2020-07-31-errors-in-j.html
Comment linking /posts/2020-07-31-errors-in-j.html
on “J Notation as a Tool of Thought”Submitted How I configure BorgBackup and borgmatic (2023) as a story · 40 points
HN discussiondump1090 is still very alive, I recently gave FlightAware‘s fork a spin: https://www.justus.pw/posts/2023-05-09-ads-b-aircraft-tracki...
Comment linking /posts/2023-05-09-ads-b-aircraft-tracking-at-home.html
on “Freakwan: A MicroPython driver for the SX1276 LoRa chip”Submitted Errors in J as a story · 3 points
HN discussionMay I perhaps add my rant 50 cents here and link to my post about this? https://www.justus.pw/garden/telemetry.html It’s opt out, and it doesn’t even completely disable it (unless given an env var as well) The devs know about this: https://github.com/storybookjs/storybook/discussions/19910
Comment linking /garden/telemetry.html
on “PSA: Storybook sends telemetry data, opt-in by default”Submitted Fix compression format error when installing J as a story · 2 points
HN discussionLate to the party, too: I blog on and off at https://www.justus.pw/ Mostly things I hack on at home, or weird stuff I find online and stuff that I have read about.
Comment linking /
on “Ask HN: Could you share your personal blog here?”Submitted Cybersecurity by the Book as a story · 2 points
HN discussionSubmitted Operating a private 5G station in Japan as a story · 2 points
HN discussionSubmitted A year later, a bug fix as a story · 2 points
HN discussionSubmitted Python 3 Statistics Module and Salaries as a story · 2 points
HN discussionSubmitted Generate Nix binary caches without Nix copy as a story · 1 points
HN discussionSubmitted Can uBlock Origin Block WebRTC? as a story · 1 points
HN discussionSubmitted DiceCTF 2024 qualifications Calculator Writeup as a story · 1 points
HN discussionSubmitted Opt-Out Telemetry Shit Show as a story · 1 points
HN discussionSubmitted This Time It's Different as a story · 1 points
HN discussionSubmitted Errors in J as a story · 1 points
HN discussionSubmitted A brief UberRUSH overview and tutorial as a story · 1 points
HN discussion