Arjen (a.k.a. credmp) @arjenwiersma.nl · 10/12/2025Made an interactive, incomplete, history family tree of editors. Any additions or anecdotes are welcome. See it in action: arjenwiersma.nl/editors.html it has #emacs #vim #basic #cpp editors galore! 031
Arjen (a.k.a. credmp) @arjenwiersma.nl · 24/11/2025Npm, the gift that keeps on giving. Another mass ransomware attack; helixguard.ai/blog/malicio... 010
Arjen (a.k.a. credmp) @arjenwiersma.nl · 07/11/2025Hey #Java #Emacs users, I am trying to smoothen my workflow. One thing that annoys me is to go to mvnrepository.com to look up a package. I am creating a little helper for it, anyone interested? 041
Arjen (a.k.a. credmp) @arjenwiersma.nl · 06/11/2025I gave my workshop at #jfall2025 #jfall today. It was a success, a packed room and people working through my AI challenges for 2 hours. If you attended you might like the slides, they are available on my talks page: arjenwiersma.nl/talks/arjenwiersma.nlArjen WiersmaTalks I occasionally speak at conferences and meetups. Below are some of my active talks that I am presenting. If you would like me to present at your conference or meetup, feel free to contact me. 000
Arjen (a.k.a. credmp) @arjenwiersma.nl · 06/11/2025Just finished up my workshop at #jfall #jfall2025! Great crowd and lots of interaction, even in the silent disco setup! 010
Arjen (a.k.a. credmp) @arjenwiersma.nl · 01/11/2025I made an update to my #emacs upiv package from yesterday, it now supports marginalia mode for even nicer support with configuring use-package. URL: forge.arjenwiersma.nl/arjen/upiv 050
Arjen (a.k.a. credmp) @arjenwiersma.nl · 30/10/2025I so love my #emacs, was configuring some packages and wanted something easier, so I wrote a small function that will look up all the custom variables for a package and provide them as completion, allowing you to easily insert them. Trying to be more like @xenodium.bsky.social by sharing. 182
Arjen (a.k.a. credmp) @arjenwiersma.nl · 12/10/2025During my talk at #devoxx I talked about how big systems leak data through bad #ai implementations, this morning I read about copilot for GitHub: www.legitsecurity.com/blog/camolea... it never stops…legitsecurity.comCamoLeak: Critical GitHub Copilot Vulnerability Leaks Private Source CodeGet details on our discovery of a critical vulnerability in GitHub Copilot Chat. 010
Reposted by Arjen (a.k.a. credmp)SDG @stevendegroote.bsky.social · 08/10/2025Ranking of different types of developers #vibecoding #devoxx #useyourbrain 032
Arjen (a.k.a. credmp) @arjenwiersma.nl · 08/10/2025Had an amazing time presenting at #Devoxx! The room was packed, with some people sitting on the stairs, if the favorites are anything to go by there were over 300 people in the room. The talk was rated 4.7 out of 5, which for me is amazing, thank you all so much! 050
Arjen (a.k.a. credmp) @arjenwiersma.nl · 06/10/2025My talk at #Devoxx is up to 69 ❤️! Nice! Hope to see you all on Wednesday! 040
Arjen (a.k.a. credmp) @arjenwiersma.nl · 21/09/2025Love this article on a new industry; cleaning up vibe coded projects donado.co/en/articles/...donado.coVibe Coding Cleanup as a ServiceThe rise of AI-powered coding has created an unexpected market: cleaning up the technical debt from prompt-generated software. Here's why 'Vibe Coding cleanup' is becoming a legitimate service categor... 000
Arjen (a.k.a. credmp) @arjenwiersma.nl · 04/09/2025Hey you Java person! Are you going to @devoxx.com ? Be sure to visit my talk on the security side of vibe-coding. Check it out in the app: www.devoxx.be/app/talk/325...devoxx.beDevoxx Companion App – Devoxx Belgium 010
Arjen (a.k.a. credmp) @arjenwiersma.nl · 04/09/2025In april Microsoft said 30% of their code was written by AI, coinbase is pushing even further with 40% and aiming for 50% by October. Massive numbers, but still in a controlled way (reviewed) 110
Arjen (a.k.a. credmp) @arjenwiersma.nl · 04/09/2025Tonight I will be presenting at the #DevPulse meetup in the city of Zwolle. See you there! 000
Reposted by Arjen (a.k.a. credmp)Devoxx Belgium @devoxx.com · 28/08/2025📅 The wait is over: the #Devoxx Belgium 2025 schedule is out! Plan your week, pick your favourites ❤️https://m.devoxx.com/events/dvbe25/schedule 02318
Reposted by Arjen (a.k.a. credmp)Adam Jacob @adamhjk.me · 22/07/2025Rest well, Ozzy. Everyone listen to Tribute in his honor today. music.apple.com/us/album/tri...music.apple.comTribute (Live) by Ozzy Osbourne on Apple MusicAlbum · 1987 · 14 Songs 173
Arjen (a.k.a. credmp) @arjenwiersma.nl · 23/06/2025Just posted my first of 12(!) parts on AI Security. A bite-sized deep-dive into AI security delivered right into your mailbox from my substack. Check it out: credmp.substack.com 011
Arjen (a.k.a. credmp) @arjenwiersma.nl · 09/06/2025For me #clojure is like stoic philosophy, leading a simple and humble life in the #repl. 020
Arjen (a.k.a. credmp) @arjenwiersma.nl · 18/05/2025EU ruling: tracking-based advertising across Europe has no legal basis. A massive ruling that is effective right away, means that organisations that rely heavily on advertisement (such as dpg/nu.nl in the Netherlands) will have to review and adjust their practices. www.iccl.ie/digital-data...iccl.ieEU ruling: tracking-based advertising by Google, Microsoft, Amazon, X, across Europe has no legal basis - Irish Council for Civil LibertiesLandmark court decision against “TCF” consent pop ups on 80% of the internet 000
Arjen (a.k.a. credmp) @arjenwiersma.nl · 18/05/2025Remember how Microsoft said it would go to court to protect European interests if faced with American orders to work against it? Seems it was not entirely true: www.techradar.com/pro/microsof... www.pbs.org/newshour/wor... “Microsoft, for example, cancelled Khan’s email address”.techradar.comMicrosoft says it would take the US to court to protect European cloud operations | TechRadarMicrosoft makes five promises to European customers 021
Arjen (a.k.a. credmp) @arjenwiersma.nl · 08/05/2025Every once in a while I try different knowledge management systems, recently I have been using #logseq, but I always come back to the simplicity of my #emacs setup with org-roam… 020
Arjen (a.k.a. credmp) @arjenwiersma.nl · 05/04/2025Went shopping for comics today, completed my 1-100 series for Spawn and added a good chunk for 100-200. Kinda feels like Christmas. #comics #spawn 000
Arjen (a.k.a. credmp) @arjenwiersma.nl · 13/03/2025Today I was at the futuretech conference in Utrecht. Really liked @fonssonnemans.bsky.social talk about performance analysis. 121
Arjen (a.k.a. credmp) @arjenwiersma.nl · 29/01/2025Using @openvibe.social feels to me like using eBuddy back when there were a lot of instant messaging apps. Everything neatly in a single space, one user experience. Very nice so far. 130
Arjen (a.k.a. credmp) @arjenwiersma.nl · 30/12/2024Do we know anyone at @digitalocean.com here? Their app platform has a provisioning issue that renders postgres 16 dev databases useless and their support is not particularly helpful. Any help in my network is appreciated! #digitalocean #postgresql 000
Reposted by Arjen (a.k.a. credmp)Slashdot @slashdot.org · 10/12/2024Hey it'd be super cool if you reposted this post to let all your cool friends know that @slashdot.org is on Bluesky now! 207860
Arjen (a.k.a. credmp) @arjenwiersma.nl · 15/12/2024Day 15 of #adventofcode was quite a puzzler. Rewrote my solution several times. I take solace in the fact that the fastest solvers needed 15 minutes, which means the problem was hard. My notes on my #Java solution are here: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 041
Arjen (a.k.a. credmp) @arjenwiersma.nl · 14/12/2024My #adventofcode in #java notes for Day 14 are up. This day has some math with modulo for wrapping around grids, also, Java module does things with negative numbers. Check out the notes here: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 151
Arjen (a.k.a. credmp) @arjenwiersma.nl · 13/12/2024My notes on day 13 of #adventofcode in #java are up. Today I used math to solve the problem: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 031
Arjen (a.k.a. credmp) @arjenwiersma.nl · 12/12/2024My notes on #adventofcode in #java for Day 12 are up! Had quite some work with finding a nice way to count the sides, so instead I counted corners. Check it out: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 081
Arjen (a.k.a. credmp) @arjenwiersma.nl · 11/12/2024Day 11 of the #adventofcode was one to remember. My notes on attacking this problem in #java are here: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 051
Arjen (a.k.a. credmp) @arjenwiersma.nl · 10/12/2024#adventofcode is not disappointing this year! Had great fun on Day 9 and Day 10. My notes on doing the puzzles in #java are up: arjenwiersma.nl/posts/aoc-20... . For those curious, my Day 9 part 2 runs in less then 50ms :D. Now it is time to watch the videos from #emacsconf, thanks @sachachua.com !arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 051
Arjen (a.k.a. credmp) @arjenwiersma.nl · 09/12/2024Jammer om te zien hoe (relatief) slecht onze @ns.nl scoort in vergelijking met andere Europese diensten: www.transportenvironment.org/articles/rai...transportenvironment.orgMind the gap! Europe’s Rail Operators: a Comparative RankingEurope’s leading advocates for clean transport & energy 000
Arjen (a.k.a. credmp) @arjenwiersma.nl · 08/12/2024Day 8 of #adventofcode in #java is solved! I wrote my notes on my running blog article: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 021
Arjen (a.k.a. credmp) @arjenwiersma.nl · 07/12/2024Sad to read that Nicko is retiring, much love to his drumming skills. Up the irons, Nicko! Loved all 14 live shows I visited. www.ironmaiden.com/an-announcem...ironmaiden.comAn Announcement from Iron Maiden - Iron MaidenAn announcement... 000
Arjen (a.k.a. credmp) @arjenwiersma.nl · 07/12/2024My notes on #adventofcode day 6 and 7 in #java are up! Check them here: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 031
Arjen (a.k.a. credmp) @arjenwiersma.nl · 07/12/2024I just completed "Bridge Repair" - Day 7 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/7, compared to yesterday it was a breeze, just a good case of recursion :Dadventofcode.comDay 7 - Advent of Code 2024 040
Arjen (a.k.a. credmp) @arjenwiersma.nl · 06/12/2024#adventofcode today left me with only a bruteforcing option. Doesn't feel right, but it solves. #java 021
Arjen (a.k.a. credmp) @arjenwiersma.nl · 05/12/2024Solving part 2 of day 5 from the #adventofcode turned out to be surprisingly easy using #java Comparator classes. Just a custom sort function to save the day! My notes on the day are here: arjenwiersma.nl/posts/aoc-20... 021
Arjen (a.k.a. credmp) @arjenwiersma.nl · 04/12/2024Day 4 of #adventofcode was a lot of fun again. I quickly stepped into the "lets do some pathfinding" pitfall to only step back to basic array operations for part 2. My notes on the implementation in #Java are here: arjenwiersma.nl/posts/aoc-20...arjenwiersma.nlAdvent of Code 2024It is December again and that means it is time for the Advent of Code. Due to my workload and family obligations I will probably not be able to get very far this year, but still I wanted to write a po... 182
Arjen (a.k.a. credmp) @arjenwiersma.nl · 03/12/2024When I professionally started programming it was in #Perl and I worked on a log parsing system. It had the most convoluted regular expressions around.... and in Day 3 of the #adventofcode I had a use for that knowledge, once again! Using regexes made this problem easy. 040
Arjen (a.k.a. credmp) @arjenwiersma.nl · 02/12/2024In day 2 of #adventofcode you might want to splice an array and then combine it again, in #Java you can use an IntStream to seamlessly remove a single element from an array. #tipoftheday 041
Arjen (a.k.a. credmp) @arjenwiersma.nl · 01/12/2024Day 1 of #adventofcode was a great starter again. I tried to write it using streams as much as possible, and it worked out very nicely! 140
Arjen (a.k.a. credmp) @arjenwiersma.nl · 26/11/2024Almost time for #adventofcode... Spent last night dusting off some Dynamic Programming notes. No use of #ai for the challenges, just my old #brain. 120
Arjen (a.k.a. credmp) @arjenwiersma.nl · 24/11/2024Love how modern #java enables rapid creation of apps. Spent a few hours this morning building an #ai tool using #springboot and #htmx. Ready for production. 052
Arjen (a.k.a. credmp) @arjenwiersma.nl · 23/11/2024@zamansky.bsky.social hey Mike 👋 great to see you here! 100
Reposted by Arjen (a.k.a. credmp)LASTLAPLUCY 🏎️ @lastlaplucy.bsky.social · 16/11/2024🗣️ ATTENTION FORMULA 1 COMMUNITY !! Repost this to be added to a starter pack list of #F1 fans. Let's bring our community together! 🏎️ #Formula1 41229282
Reposted by Arjen (a.k.a. credmp)Brandon @blaron.bsky.social · 15/11/2024If you are in cybersecurity repost this so we can all follow each other 😬 1181113
