Alf Kåre Lefdal 's Avatar

Alf Kåre Lefdal

@aklefdal

Norwegian developer living in the suburbs of Oslo. DDD, .NET, F# and C#, Azure, socio-technical organisation. Partner and senior consultant at Aurum AS

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12.11.2024
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Latest posts by Alf Kåre Lefdal @aklefdal

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Perhaps not too impressive for now but this shows Giraffe (F#) running on the BEAM (Erlang Runtime) using Fable (WIP) #fablecompiler #fsharp

11.02.2026 20:24 👍 25 🔁 5 💬 4 📌 1

In the coming weeks I'm giving the tactical DDD training twice. And something struck me while preparing: with agentic AI becoming more capable, Domain-Driven Design isn't becoming less relevant. For complex problems, it's becoming a necessity.
...

09.02.2026 11:45 👍 4 🔁 3 💬 1 📌 0
Is the craft dead? The Japanese are really good at woodworking. And I love watching the Yankee ...

"I think that there will be lots of work for us cleaning up after the slop, [...]"
www.hanselman.com/blog/is-the-... by @scott.hanselman.com

09.02.2026 21:53 👍 1 🔁 0 💬 0 📌 0
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An ode to “Slowly” HANDCRAFTED code When I open my social media feeds, it is obvious: the age of writing code with our fingers is ending. LLMs and agents can write code much faster. But was it ever about the speed of source code…

An ode to "slowly" handcrafted code
www.planetgeek.ch/2026/02/02/a...

When I open my social media feeds, it's obvious: the age of writing code with our fingers is ending. LLMs can write code much faster.

But was it ever about the speed of code creation? I think not.

#LLMs #agents #fsharp

03.02.2026 09:20 👍 21 🔁 6 💬 1 📌 2
Meme

Biblio holds the phone

On the phone: chatGPT: "You're absolutely right - you found it"

Meme Biblio holds the phone On the phone: chatGPT: "You're absolutely right - you found it"

After all, why not? Why shouldn't I keep it?

28.01.2026 19:29 👍 19 🔁 11 💬 0 📌 0

I'm convinced AI is our generation's radium - a discovery with genuinely useful applications in specific, controlled circumstances that we stupidly put in everything from kid's toys to toothpaste until we realised the harm far too late where future generations will ask if we were out of our minds.

08.02.2026 22:23 👍 17924 🔁 5440 💬 245 📌 257
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Have I hardened against LLMs? Writing at the end of the world, from Hveragerði, Iceland

"Have I hardened against LLMs?"

www.baldurbjarnason.com/2026/have-i-...

09.02.2026 11:39 👍 31 🔁 17 💬 1 📌 6
Fotgjengeren hadde ifølge rapporten refleks på skoene og på ryggsekken, og det kan ha vært vanskelig for sjåføren å se disse. Rapporten sier også at det bør vurderes om det er behov for nye informasjonskampanjer om bruk av refleks, samt egnetheten og synligheten til ulike reflekstyper.

– Hva er din kommentar til dette?

– Vi i Akershus fylkeskommune har fokus på refleksbruk, og refleksdagen er en årlig merkedag. Vi bidro også i år på refleksdagen 16. oktober, sier Moe.

Fotgjengeren hadde ifølge rapporten refleks på skoene og på ryggsekken, og det kan ha vært vanskelig for sjåføren å se disse. Rapporten sier også at det bør vurderes om det er behov for nye informasjonskampanjer om bruk av refleks, samt egnetheten og synligheten til ulike reflekstyper. – Hva er din kommentar til dette? – Vi i Akershus fylkeskommune har fokus på refleksbruk, og refleksdagen er en årlig merkedag. Vi bidro også i år på refleksdagen 16. oktober, sier Moe.

Pansret bilfører kjørte på og drepte fotgjenger i gangfelt. Vegvesenet og fylkeskommunen vil ikke sette ned fartsgrensen, men kritiserer avdøde for å ha hatt refleks bare på sko og ryggsekk. www.varingen.no/rapport-om-d...

29.10.2025 10:54 👍 59 🔁 16 💬 11 📌 4

17-åring med stor, rød papaply blir meid ned i gangfelt av bilist i 80-årene midt på lyse dagen.

Trygg Trafikk «anbefaler alle å bruke refleks» og å «krysse veien der det er god belysning».

05.12.2025 13:05 👍 18 🔁 4 💬 2 📌 0
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25.12.2025 15:20 👍 1 🔁 0 💬 0 📌 0

The second image is a photogragh - not a modern AI generated image - from Oslo a few weeks ago...

06.12.2025 00:22 👍 1 🔁 0 💬 0 📌 0
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F# Advent Calendar in English 2025 🎄 It’s that magical time of year again! 🎅🏻Christmas is twinkling on the horizon, and that means one thing — it’s time for the 12th annual F# Advent in English! It’s incredible to think that our tra…

F# Advent Calendar in English 2025 #fsharp #FsAdvent sergeytihon.com/2025/11/03/f...

03.11.2025 21:26 👍 12 🔁 5 💬 2 📌 6

“November always seemed to me the Norway of the year.”

—Emily Dickinson

01.11.2025 15:49 👍 13 🔁 3 💬 0 📌 0
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Trump Defends Demolition Of Yggdrasil, Ancient Tree Of Life WASHINGTON—Claiming that the sacred ash tree had outlived its usefulness and needed to be updated, President Donald Trump made remarks Monday defending his demolition of Yggdrasil, the ancient tree of...

Trump Defends Demolition Of Yggdrasil, Ancient Tree Of Life

01.11.2025 18:00 👍 1944 🔁 310 💬 30 📌 9
7 Reasons F# Sucks Date: 2025-06-18 | build | create | csharp | fsharp | tech |

Strong, expressive types removes the need for many kinds of parameterized tests.

Instead the compiler works as the test - if it doesn't conform to the definition, the code won't even compile.

Reason #5 F# sucks: Your buggy code won't even compile

hamy.xyz/blog/2025-06...

#fsharp

18.10.2025 16:54 👍 10 🔁 5 💬 0 📌 0
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Code BEAM Europe 2025 - 5-6 NOV Berlin & Online The Erlang and Elixir conference in Europe - 2 days of talks,discussions and networking for the BEAM community.

You do not need an ORM! This November I'll be at @codebeam.bsky.social to show how sticking to SQL can be great fun and have a stellar developer experience ⭐️
codebeameurope.com

27.10.2025 13:15 👍 17 🔁 3 💬 1 📌 0

“Leaders not Tweeters” is the rebrand America needs.

28.10.2025 14:06 👍 1155 🔁 79 💬 15 📌 2
Code
From a 2015 BlackHat presentation

Code From a 2015 BlackHat presentation

Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it. - Brian Kernighan

27.10.2025 15:42 👍 5 🔁 4 💬 0 📌 0
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I 2005 regnet de med at Ensjøveien og Gladengveien ville ha 15 000 kjøretøy i døgnet da utbyggingen var ferdig. I dag er trafikken 5-6000 biler i døgnet. Omtrent en tredjedel.

12.10.2025 15:11 👍 32 🔁 2 💬 2 📌 0
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People with ADHD may have an underappreciated advantage: Hypercuriosity ADHD is officially a disorder of deficits in attention, behavior and focus. But patients point out upsides, like curiosity. Research is now catching up.

If you're an ADHDer, or live or work with one, you may find this of interest: "People with ADHD may have an underappreciated advantage: Hypercuriosity"
www.sciencenews.org/article/adhd...

27.09.2025 11:47 👍 28 🔁 7 💬 2 📌 0
In 1980 the road is open to cars, is wide and has cars parked on it. Today there are rising bollards preventing driving on this street and all car parking removed, replaced by outdoor seating outside a pub

In 1980 the road is open to cars, is wide and has cars parked on it. Today there are rising bollards preventing driving on this street and all car parking removed, replaced by outdoor seating outside a pub

Zeedijk, Amsterdam in 1980 and today.

10.10.2025 16:30 👍 109 🔁 17 💬 0 📌 0
Czardas - tuba solo full version (baadsvik)
Czardas - tuba solo full version (baadsvik) YouTube video by Øystein Baadsvik

Czardas med Øystein Baadsvik er kul!

youtu.be/fYOsNp4O7AU?...

05.10.2025 22:07 👍 1 🔁 0 💬 1 📌 0
Anyone: Why are there suddenly so many AHDH diagnoses?
Dr. Jen: Same reason there are suddenly more stars after we built telescopes.

Anyone: Why are there suddenly so many AHDH diagnoses? Dr. Jen: Same reason there are suddenly more stars after we built telescopes.

The mystery of medical diagnosis!

03.10.2025 18:25 👍 8050 🔁 2568 💬 45 📌 78
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History repeats.

04.10.2025 06:54 👍 11589 🔁 5574 💬 271 📌 301
A hand holding a tiny rubber duck.

A hand holding a tiny rubber duck.

Pocket debugger...

19.09.2025 12:37 👍 53 🔁 4 💬 3 📌 0

“Look Ma’ no hands!”

It’s interesting how much audience (in our industry) are getting people showing that’s the best/only way to ride a bicycle.

For some it is, but they usually have big red noses.

For other trying to follow that advice, the next step is tho

„Look Ma’ no teeth!”

🤷‍♂️

18.09.2025 10:03 👍 2 🔁 1 💬 0 📌 0
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.NET STS releases supported for 24 months - .NET Blog .NET STS releases will be supported for 24 months

.NET STS releases are now supported for 2 years instead of 18 months starting with .NET 9 (the current STS). STS releases now go out-of-support on the same day as the previous LTS release. Upgrading to an STS release will no longer cause you to lose support!
devblogs.microsoft.com/dotnet/dotne...

16.09.2025 17:56 👍 79 🔁 36 💬 8 📌 6

Dette er sykling! Effektiv transport i by.

10.09.2025 11:35 👍 1 🔁 0 💬 0 📌 0
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Yes, it’s a BMW. What else would it be?
#WorldBollardAssociation 🤭

01.09.2025 19:04 👍 1264 🔁 153 💬 42 📌 15
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“Blind obedience to authority is the greatest enemy of truth.”

— Albert Einstein (1879–1955)

30.08.2025 14:03 👍 5478 🔁 1567 💬 58 📌 42