Scala

• It's a functional programming language
• It's thread safe. Good to run parallel jobs
• Compiles into java bytecode and runs on top of JVM
• Versions
• Scala 2.13 is the widely used scala version
• Scala 3 (also known as dotty) is not yet widely adopted. It is incompatible with scala 2.13 or older

Metals

• Metals is the LSP for Scala
• On vscode, the extension activates automatically whenever a scala files or a build.sbt is detected
• Choose to import build to setup the project

VSCode Support

• Extensions
• scala-lang.scala
• scalameta.metals