A Dozen Cool Things We Can Do With Popular JVM Languages
summary
Twelve concrete tricks across Java, Scala, Groovy and Kotlin: quick file reads via Groovy .text and Kotlin readText or Scala Source.fromFile.mkString, launching OS commands with String.execute (Groovy) which cut 150–200 lines to ~50–75, an explicit Resource.use pattern (lambda + try/finally) for execute‑around, Scala traits for stackable mixins, Collectors.joining, Kotlin lazy evaluation and pattern matching with smart casting, DSL XML generation with Groovy MarkupBuilder, tail‑call optimization notes, extension and infix functions for fluent APIs.
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chapters (9)
- 0:00Start
- 2:55Accessing a File
- 4:31Kotlin
- 11:03The Execute around Method Pattern
- 11:51The Execute around the Method Pattern
- 32:24Pattern Matching Syntax
- 34:45Auto Casting
- 37:18Generate an Xml Document
- 40:51Tail Call Optimization
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