5 JVM languages in 50 minutes
summary
Covers five JVM languages — Clojure, Scala, JRuby, Groovy, Kotlin — with concrete demos and install paths: use sdkman to install most runtimes, Groovy + Ratpack + Gradle shows a micro‑web app, Scala runs an Apache Spark job that estimates Pi with Spark via Docker Compose, Clojure emphasizes REPL-driven development and Luminus/lein templates, JRuby + Rails scaffolds a full app, and Kotlin highlights null‑safety and compiled interop. Examples run end‑to‑end.
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chapters (12)
- 0:00Language and thought
- 2:04JVM languages overview
- 3:48Groovy language features
- 7:58Building with Ratpack
- 13:24Scala and functional programming
- 17:22Data processing with Spark
- 20:25Clojure and Lisp philosophy
- 25:26REPL-driven development
- 28:34Web applications in Clojure
- 32:19JRuby and metaprogramming
- 38:08Kotlin and null safety
- 40:00Q&A and conclusion
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