Alexandru Nedelcu
@alexn.org
Software developer, FP, Scala, Kotlin, Java / JVM, Haskell, Rust; contributor to https://alexn.org, https://monix.io, https://typelevel.org.
🌍 Bucharest, Romania
https://alexn.org/about/
🌍 Bucharest, Romania
https://alexn.org/about/
I reported a #Scala 3 bug, and it was fixed in one day 😀
And this isn't the first time I'm amazed of how fast some reported issues get solved in this repository.
github.com/scala/scal...
And this isn't the first time I'm amazed of how fast some reported issues get solved in this repository.
github.com/scala/scal...
Type inference issue for @Nullable Java parameters · Issue #25228 · scala/scala3
Compiler version 3.8.1 with -Yexplicit-nulls Minimized code This code involves some Java using nullability annotations such as those from Jetbrains: public record Foo(@Nullable String param) {} Sam...
github.com
February 12, 2026 at 1:42 PM
I reported a #Scala 3 bug, and it was fixed in one day 😀
And this isn't the first time I'm amazed of how fast some reported issues get solved in this repository.
github.com/scala/scal...
And this isn't the first time I'm amazed of how fast some reported issues get solved in this repository.
github.com/scala/scal...
Project exposing a Delayed Queue, for #Java, #Kotlin and #Scala … a database-powered message queue that can also delay messages, with support for your favourite RDBMS.
github.com/funfix/dat...
github.com/funfix/dat...
GitHub - funfix/database: Database toolkit for the JVM
Database toolkit for the JVM. Contribute to funfix/database development by creating an account on GitHub.
github.com
February 12, 2026 at 9:17 AM
Project exposing a Delayed Queue, for #Java, #Kotlin and #Scala … a database-powered message queue that can also delay messages, with support for your favourite RDBMS.
github.com/funfix/dat...
github.com/funfix/dat...
I wanted to make a dumb joke on soon seeing social networks designed exclusively for AI Agents, but it was already built.
February 11, 2026 at 1:33 PM
I wanted to make a dumb joke on soon seeing social networks designed exclusively for AI Agents, but it was already built.
A colleague investigated a unit-test that was mysteriously failing on some dev laptops, whereas it was passing in CI. It turns out it's because #Bulgaria's currency just changed to EUR ❤️ so it depends on how up to date the #Java runtime is.
Happy dev/prod/CI divergence day 😜
Happy dev/prod/CI divergence day 😜
February 10, 2026 at 9:50 AM
"Beyond agentic coding"
I like VS Code's more recent inline hints, and coupled with the inevitable chat fatigue, I'm thinking the author is right.
haskellforall.com/202...
I like VS Code's more recent inline hints, and coupled with the inevitable chat fatigue, I'm thinking the author is right.
haskellforall.com/202...
Beyond agentic coding
AI dev tooling can do better than chat interfaces
haskellforall.com
February 8, 2026 at 3:14 PM
"Beyond agentic coding"
I like VS Code's more recent inline hints, and coupled with the inevitable chat fatigue, I'm thinking the author is right.
haskellforall.com/202...
I like VS Code's more recent inline hints, and coupled with the inevitable chat fatigue, I'm thinking the author is right.
haskellforall.com/202...
I was looking at a piece of #Scala code today, written ~3 years ago for $work, and I'm in awe of its maturity and elegance.
Granted, it was my own code 😀
Granted, it was my own code 😀
February 6, 2026 at 11:20 AM
I was looking at a piece of #Scala code today, written ~3 years ago for $work, and I'm in awe of its maturity and elegance.
Granted, it was my own code 😀
Granted, it was my own code 😀
Hey everyone, apparently it takes $20,000 and zero developers to copy/paste code from GCC & LLVM. That code was already available, ofc, so that money is for whitewashing the OSS licensing and copyright away. Exciting times!
February 6, 2026 at 10:56 AM
Hey everyone, apparently it takes $20,000 and zero developers to copy/paste code from GCC & LLVM. That code was already available, ofc, so that money is for whitewashing the OSS licensing and copyright away. Exciting times!
Small update for my Funfix Tasks project — I've added integration with Kotlin's Coroutines.
github.com/funfix/tasks...
github.com/funfix/tasks...
Release v0.4.0 · funfix/tasks
What's Changed
This release adds Kotlin integration in #16
It exposes the tasks-kotlin-coroutines subproject, for converting Task ↔ suspending functions.
Full Changelog: v0.3.1...v0.4.0
github.com
February 1, 2026 at 7:14 PM
Small update for my Funfix Tasks project — I've added integration with Kotlin's Coroutines.
github.com/funfix/tasks...
github.com/funfix/tasks...
Not sure if “skills” are useful for AI Agents, but maintaining my own repository makes sense, since I can be in control. This is very much experimental, and may change a lot.
#AI #LLM #Scala #Kotlin
https://github.com/al...
#AI #LLM #Scala #Kotlin
https://github.com/al...
GitHub - alexandru/skills
Contribute to alexandru/skills development by creating an account on GitHub.
github.com
February 1, 2026 at 10:08 AM
Not sure if “skills” are useful for AI Agents, but maintaining my own repository makes sense, since I can be in control. This is very much experimental, and may change a lot.
#AI #LLM #Scala #Kotlin
https://github.com/al...
#AI #LLM #Scala #Kotlin
https://github.com/al...
With that Take That documentary, I remembered one of my old time favorite songs, depressive af though
https://youtu.be/AHU-...
https://youtu.be/AHU-...
Robbie Williams - Advertising Space
robbiewilliamsvevo
youtu.be
January 30, 2026 at 9:57 PM
With that Take That documentary, I remembered one of my old time favorite songs, depressive af though
https://youtu.be/AHU-...
https://youtu.be/AHU-...
“7 learnings from Anders Hejlsberg: The architect behind C# and TypeScript”
He's a language designer with great taste, an opinion I've held for the last 20 years ❤️
github.blog/developer-sk...
He's a language designer with great taste, an opinion I've held for the last 20 years ❤️
github.blog/developer-sk...
7 learnings from Anders Hejlsberg: The architect behind C# and TypeScript
Anders Hejlsberg shares lessons from C# and TypeScript on fast feedback loops, scaling software, open source visibility, and building tools that last.
github.blog
January 30, 2026 at 4:23 PM
“7 learnings from Anders Hejlsberg: The architect behind C# and TypeScript”
He's a language designer with great taste, an opinion I've held for the last 20 years ❤️
github.blog/developer-sk...
He's a language designer with great taste, an opinion I've held for the last 20 years ❤️
github.blog/developer-sk...
Devs that avoided learning to touch-type, for more efficient “coding”, are now feeling vindicated, because they are now writing English texts instead.
Speech-to-text is getting better though, hang in there!
Speech-to-text is getting better though, hang in there!
January 30, 2026 at 8:28 AM
Devs that avoided learning to touch-type, for more efficient “coding”, are now feeling vindicated, because they are now writing English texts instead.
Speech-to-text is getting better though, hang in there!
Speech-to-text is getting better though, hang in there!
I dislike the `*>` and `>>` operators from #CatsEffect, because it introduces too many ways of doing things, and because it … doesn't look good for multi-line expressions. Abused by devs and LLMs alike.
Similar feelings for `fold` on Either/Option.
#Scala
Similar feelings for `fold` on Either/Option.
#Scala
January 30, 2026 at 7:30 AM
I dislike the `*>` and `>>` operators from #CatsEffect, because it introduces too many ways of doing things, and because it … doesn't look good for multi-line expressions. Abused by devs and LLMs alike.
Similar feelings for `fold` on Either/Option.
#Scala
Similar feelings for `fold` on Either/Option.
#Scala
"Scoped Error Capabilities in cats-mtl"
I started experimenting with cats-mtl, too. I kind of like the idea of expressing typed errors as givens (implicits).
https://youtu.be/cTKWpYMciV8?si=a6KFjHdE7U-_HPrm
I started experimenting with cats-mtl, too. I kind of like the idea of expressing typed errors as givens (implicits).
https://youtu.be/cTKWpYMciV8?si=a6KFjHdE7U-_HPrm
Scoped Error Capabilities in cats-mtl
Jakub Kozłowski
youtu.be
January 29, 2026 at 9:27 PM
"Scoped Error Capabilities in cats-mtl"
I started experimenting with cats-mtl, too. I kind of like the idea of expressing typed errors as givens (implicits).
https://youtu.be/cTKWpYMciV8?si=a6KFjHdE7U-_HPrm
I started experimenting with cats-mtl, too. I kind of like the idea of expressing typed errors as givens (implicits).
https://youtu.be/cTKWpYMciV8?si=a6KFjHdE7U-_HPrm
Reposted by Alexandru Nedelcu
January 28, 2026 at 4:58 PM
Reposted by Alexandru Nedelcu
IntelliJ Scala Plugin 2025.3.28 is out! This bug-fix release brings the following improvements:
- The JUnit plugin is no longer required to run most Scala test frameworks.
- Support for using/given in structural search has been enhanced.
- Support for sbt 0.13 projects on Windows is back.
#scala
- The JUnit plugin is no longer required to run most Scala test frameworks.
- Support for using/given in structural search has been enhanced.
- Support for sbt 0.13 projects on Windows is back.
#scala
January 29, 2026 at 4:05 PM
IntelliJ Scala Plugin 2025.3.28 is out! This bug-fix release brings the following improvements:
- The JUnit plugin is no longer required to run most Scala test frameworks.
- Support for using/given in structural search has been enhanced.
- Support for sbt 0.13 projects on Windows is back.
#scala
- The JUnit plugin is no longer required to run most Scala test frameworks.
- Support for using/given in structural search has been enhanced.
- Support for sbt 0.13 projects on Windows is back.
#scala
Discovered a gem in my bookmarks on what favicons a website needs.
https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs
https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs
How to Favicon in 2026: Three files that fit most needs—Martian Chronicles, Evil Martians’ team blog
Prefer SVG over PNG, trust browsers to downscale, drop obscure formats—the ultimate, exhaustive guide to favicons for modern web. Includes steps for static HTML and Webpack.
evilmartians.com
January 29, 2026 at 12:55 PM
Discovered a gem in my bookmarks on what favicons a website needs.
https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs
https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs
Reposted by Alexandru Nedelcu
Hey, #ScalaCLI v1.12.1 is out! The changes include:default Scala version changed to 3.8.1default Scala Native version changed to 0.5.10a number of fixes, internal changes and dependency bumps,Be sure to check the release notes here: github.com/VirtusLab/s...
January 28, 2026 at 12:46 PM
Hey, #ScalaCLI v1.12.1 is out! The changes include:default Scala version changed to 3.8.1default Scala Native version changed to 0.5.10a number of fixes, internal changes and dependency bumps,Be sure to check the release notes here: github.com/VirtusLab/s...
Integrating more AI into #Firefox is good, esp. if they put users in control 🤷♂️
Deciding to not implement something as a matter of principle is a political decision. E.g., it shows that Vivaldi, a bloated browser built on top of US tech (Chromium), is European (if you can't innovate, regulate).
Deciding to not implement something as a matter of principle is a political decision. E.g., it shows that Vivaldi, a bloated browser built on top of US tech (Chromium), is European (if you can't innovate, regulate).
January 28, 2026 at 10:03 AM
Integrating more AI into #Firefox is good, esp. if they put users in control 🤷♂️
Deciding to not implement something as a matter of principle is a political decision. E.g., it shows that Vivaldi, a bloated browser built on top of US tech (Chromium), is European (if you can't innovate, regulate).
Deciding to not implement something as a matter of principle is a political decision. E.g., it shows that Vivaldi, a bloated browser built on top of US tech (Chromium), is European (if you can't innovate, regulate).
The rise of the LLM-prompt engineer highlights how important logic and clarity in communication is. "Garbage in, garbage out" applies to AI-driven development as well. People now write more words, but less.
Ironic, as people increasingly outsource their communications & thinking to AI.
Ironic, as people increasingly outsource their communications & thinking to AI.
January 27, 2026 at 12:33 PM
The rise of the LLM-prompt engineer highlights how important logic and clarity in communication is. "Garbage in, garbage out" applies to AI-driven development as well. People now write more words, but less.
Ironic, as people increasingly outsource their communications & thinking to AI.
Ironic, as people increasingly outsource their communications & thinking to AI.
#Kotlin's Ktor HTTP toolkit is pretty cool, having everything I need, like:
- Multiplatform support;
- Cancellation of HTTP requests;
- OpenAPI docs auto-generation.
https://blog.jetbrains.com/kotlin/2026/01/ktor-3-4-0-is-now-available/
- Multiplatform support;
- Cancellation of HTTP requests;
- OpenAPI docs auto-generation.
https://blog.jetbrains.com/kotlin/2026/01/ktor-3-4-0-is-now-available/
Ktor 3.4.0 Is Now Available! | The Kotlin Blog
Ktor 3.4.0 is now available! It improves stability and addresses outstanding issues. Highlights include OpenAPI generation, Ztsd support for the compression plugin, duplex streaming for OkHttp, Structured concurrency integrations for the HTTP request lifecycle, and much more. For a detailed list of all the changes, check out the What’s new page.
blog.jetbrains.com
January 26, 2026 at 4:07 PM
#Kotlin's Ktor HTTP toolkit is pretty cool, having everything I need, like:
- Multiplatform support;
- Cancellation of HTTP requests;
- OpenAPI docs auto-generation.
https://blog.jetbrains.com/kotlin/2026/01/ktor-3-4-0-is-now-available/
- Multiplatform support;
- Cancellation of HTTP requests;
- OpenAPI docs auto-generation.
https://blog.jetbrains.com/kotlin/2026/01/ktor-3-4-0-is-now-available/
Scala 3.8 is exciting because the standard library was finally enhanced for Scala 3 specific features. For instance, “explicit nulls” are finally usable for me.
First screenshot is Scala 3.3, second is Scala 3.8. Compare the types.
https://www.scala-lang.org/news/3.8/
First screenshot is Scala 3.3, second is Scala 3.8. Compare the types.
https://www.scala-lang.org/news/3.8/
![Scala 3.3 CLI session:
scala> Option(null)
val res1: Option[Null] = None
scala> val a: Int | Null = null
val a: Int | Null = null
scala> Option(a)
val res2: Option[Int | Null] = None](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:szcli6w6dvopgysajyfu2ahi/bafkreib43wmtjdcoralzpbeo3lgq3gdhzj2duubuwuyo4piwtrkfwtxfay@jpeg)
![Scala 3.8 CLI session:
scala> Option(null)
val res1: Option[Nothing] = None
scala> val a: Int | Null = null
val a: Int | Null = null
scala> Option(a)
val res2: Option[Int] = None](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:szcli6w6dvopgysajyfu2ahi/bafkreicoucyty4owefxwpcohoswbib5qioyidek3y2ksbz4uioxtsi7v6q@jpeg)
January 26, 2026 at 4:02 PM
Scala 3.8 is exciting because the standard library was finally enhanced for Scala 3 specific features. For instance, “explicit nulls” are finally usable for me.
First screenshot is Scala 3.3, second is Scala 3.8. Compare the types.
https://www.scala-lang.org/news/3.8/
First screenshot is Scala 3.3, second is Scala 3.8. Compare the types.
https://www.scala-lang.org/news/3.8/
Reposted by Alexandru Nedelcu
it's remarkable that something as small as 1.2b can get this far. it's even correct for one input! it's a slight pity that it doesn't work for other inputs but still
January 26, 2026 at 2:54 PM
it's remarkable that something as small as 1.2b can get this far. it's even correct for one input! it's a slight pity that it doesn't work for other inputs but still