Top all-time · #17684
Rock the JVM
Company blog · rockthejvm.com/articlesprogramming
Rock the JVM is the company blog at rockthejvm.com, writing about programming. Since 2025, 4 different Hacker News readers have linked it 4 times. It is still writing: the last post was on 2026-07-17, and you can follow it by feed.
Too few sampled comments (2) to say how often HN recommends it.?
Why HN links it
HN readers link Rock the JVM for its Scala and JVM programming videos and tutorials. The linked comment points to the creator's YouTube channel and site.
Summarised by Claude from a sample of 2 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Learn Scala, Kotlin, functional programming (Cats Effect, ZIO), big data and streaming (Apache Spark, Apache Flink), all with hands-on online courses.
What Hacker News says?
Constants are useful for reasoning about code, but anyone who focuses only on making everything an immutable is missing the point. The main goal should be achieving referential transparancy. It can be perfectly fine to use mutable variables within a block, like a function when absolutely needed - for example, in JavaScript's try catch and switch statements that need to set a variable for later use. As long as these…
Comment linking /articles/what-is-referential-transparency-and-why-should-you-care
on “John Carmack on mutable variables”Submitted Kotlin 101: Type Classes Quickly Explained as a story · 24 points
HN discussionYes, this guy: https://www.youtube.com/@rockthejvm https://rockthejvm.com/ Great videos.
Comment linking /
on “Evolving Scala”Submitted ADTs (Algebraic Data Types) in Java as a story · 1 points
HN discussion