Just worked through rubbish’s scala koans and learned some new scala details. I enjoyed the meditative style, but some koans were not clear and ‘please meditate over …’ was not a helpful hint. Furthermore, I am missing some koans about pattern matching. And why does every scala package need to download its own Java runtime, sbt, …? Kind of breaks the whole linux concept of small programs doing one thing well, not to speak of package managing.

Well, I’ll be looking around for another source of scala exercises. I feel more confident in the language now, even enjoy writing it, but it seems to me that what I have seen and done so far is just the tip of the iceberg.