matejcerny 1 month ago

There are so many great thoughts, to pinpoint just a few: 1️⃣ Tooling is nowhere near other languages 2️⃣ Missing a true "Spring Boot-like" framework 3️⃣ Official docs need real-world examples 4️⃣ The persistent misconception that "you need async for performance" #scala

matejcerny 1 month ago

This is probably the most complete tutorial on typeclasses in Scala 3, it's basically a short book. Bookmark it, as it has everything: givens, derivation, mirrors, inline defs, macros... you name it. #scala https://kubuszok.com//2025/sanely-automatic-derivation/

matejcerny 1 month ago

After years, I came to the same conclusion: it's worth taking the time to use proper test data, even for attributes you don't currently use in your business logic. It'll save you so much time later.

Galaxy brain

Don't look down! Look at the data instead!

You might get the same vertigo

matejcerny 1 month ago

Scala vs. F#: Which is more functional? #scala #fsharp

Alexandru Nedelcu

Scala vs F#

Which language leans more towards functional programming? In this binary choice, people have perceived F# to be that language, due to its ML roots,...

matejcerny 1 month ago

The tech industry is creating its own talent crisis. By ditching junior devs for AI hype, companies are just burning out their seniors and killing the future talent pipeline. #ai

matejcerny 2 months ago

Binary compatibility is a very important topic that every senior should understand. This video, even though it's about Smithy4s, explains concepts for evolving a library's schema in a binary-compatible way. #scala

matejcerny 2 months ago

The most comprehensive collection of Scala learning material finally on YouTube. A freaking 283 videos! #scala https://www.youtube.com/@Ziverge/playlists

matejcerny 2 months ago

Respect to Dylan Halperin for his massive contribution to @http4s! 🚀 His new MultipartReceiver is in the latest version after over a year of review, adding safer, fail-fast file uploads with size limits and no buffering. #scala

GitHub

Release v0.23.33 · http4s/http4s

What's Changed http4s-core fix: proxy authorization header instantiation with basic credentials by @tpetillot in #7742 Introduce MultipartReceiver...

matejcerny 2 months ago

I was really looking forward to io_uring in Postgres 18, but it turns out it's not the winning I/O strategy. Worker, the new default, seems to be the best all-around method so far, performing well on all storage types. #postgres

Benchmarking Postgres 17 vs 18 — PlanetScale

Postgres 18 brings a significant improvement to read performance via async I/O and I/O worker threads. Here we compare its performance to Postgres 17.

matejcerny 2 months ago

Java is removing sun.misc.Unsafe, an API which is widely used but was never supported or meant to be public. This is one of the reasons for the adoption of JDK 17 in the upcoming version of Scala, which relies on Unsafe for its lazy val implementation. #java #scala

matejcerny 2 months ago

💡 Quick tip: Stop parsing Array[String], use @main and get type-safe command-line args directly as function parameters. #scala

matejcerny 2 months ago

Match types, an awesome feature which I haven't properly used yet 😀 #scala

Alexandru Nedelcu

Scala 3 / Match Types

Scala has a neat new feature, resembling TypeScript’s “conditional types”, but more powerful.

matejcerny 2 months ago

Taking bets on when Spark will adopt Scala 3. Just by reading the PR, my guess is never. 😔 #scala #spark

GitHub

Enable -Xsource:3 compiler flag by joan38 · Pull Request #50474 · apache/spark

What changes were proposed in this pull request? Enable -Xsource:3-cross compiler flag for future migration to Scala 3. https://docs.scala-lang.or...

matejcerny 2 months ago

Behold! The mythical Scala.js job offer is real! https://www.reddit.com/r/scala/comments/1oe9031/hiring_lead_frontend_scalajs_numind_numindai/ #scala

matejcerny 2 months ago

If you are able to represent an illegal state in your code, you should rethink your model. Start with these two simple tips 👇

Yann Moisan

A simple tool to make illegal states unrepresentable

A simple tool to make illegal states unrepresentable

#ddd #scala

matejcerny 2 months ago

Scala 3 would obviously also go in the S tier. #scala

matejcerny 2 months ago

The first Trezor with a custom-built secure element is out! What a piece of tech - Bluetooth, a special LiFePO battery with Qi2 charging, a display with 520x380 resolution, an aluminium body and an IP54 rating 🤯 #bitcoin

Trezor Safe 7 | Bitcoin-only Hardware Wallet with TROPIC01 Chip

Secure your bitcoin with Trezor Safe 7—Bluetooth, high-res color touchscreen & quantum-ready security.

matejcerny 2 months ago

🎉 Scala 3.3.7 was quietly released last week with a backported fix for Android development, improved coverage reports, hashcodes of enums, and more. #scala

GitHub

Release 3.3.7 · scala/scala3

Highlights of the release Warn a standard interpolator used toString on a reference type with -Wtostring-interpolated #20578 Unblock Scala 3 on An...

matejcerny 2 months ago

Why use a dedicated k8s operator setup when you can spend two days building your own webhook-based version in Scala? 😂 Anyway, it was a great read! #scala

Restarting Kubernetes deployments with Github Webhooks and Scala

On my lazy Kubernetes cluster that hosts various apps I want to have the easiest possible way for automatic deployments - and reacting to Github pa...

matejcerny 2 months ago

What a day to have my first on-call shift 😀 #awsoutage