Rock the JVM Blog

I’m a software engineer and the founder of Rock the JVM. I teach Scala, Kotlin, Java, big data and a variety of tech both live and in online courses.

Eta-Expansion and Partially Applied Functions in Scala

4 minute read

We explore some not-so-well-understood territory in the form of eta-expansion and how methods and functions interoperate.

17 minute read

Final blow in the type-level trilogy. We learn how to sort lists… at compile time.

10 minute read

We continue down the path of type-level power in Scala. We learn to add numbers as types, at compile time.

6 minute read

This one is hardcode. We make the Scala compiler infer type relationships for us at compile time. Pure power.

2 minute read

Abstract classes and traits share a lot of overlap in Scala. How are they actually different?

3 minute read

Various constructions like “20.seconds” look like baked into the Scala language. Let’s see how these work.

4 minute read

We explore the various flavors of nothing-ness in Scala.

6 minute read

Akka Streams has the Graph DSL, which is one of its most powerful APIs. Learn how to use it and get started quickly with Akka Streams.

14 minute read

We compare three of the most popular streaming libraries and see where Akka Streams, Kafka Streams and Spark Streaming are most useful.

3 minute read

FP fans talk about pure functional programming in Scala with type classes. They’re hard. Why do we really need them?