Learning Scala

All my Scala tutorials.

Install on Linux

Install with Coursier (cs), Scala's npm:

$ curl -fL https://github.com/coursier/launchers/raw/master/cs-x86_64-pc-linux.gz | gzip -d > cs && chmod +x cs && ./cs setup

• https://get-coursier.io/docs/cli-overview
• https://github.com/coursier/coursier
• https://github.com/coursier/launchers

Tools

• cs: Coursier, package manager
• scalac: the Scala compiler
• scala: the Scala REPL and script runner
• scala-cli: Scala CLI, interactive toolkit for Scala
• sbt & sbtn: The sbt build tool
• amm: Ammonite is an enhanced REPL
• scalafmt: Scalafmt is the Scala code formatter

Installing/Switching Versions

$ cs launch scala:2.13.10
$ cs launch scalac:2.13.10
$ cs install scala:2.13.10 scalac:2.13.10

Hello World!

# Create Scala 3 project
sbt new scala/scala3.g8
# OR Create Scala 2 project
sbt new scala/hello-world.g8

Then type project name. You can compile, run or test it with:

$ cd hello_world
$ sbt compile
$ sbt run
$ sbt console
$ sbt test
$ sbt clean

IDE

VSCode:

• https://marketplace.visualstudio.com/items?itemName=scalameta.metals
• https://marketplace.visualstudio.com/items?itemName=scala-lang.scala

IntelliJ IDEA

• https://docs.scala-lang.org/getting-started/intellij-track/getting-started-with-scala-in-intellij.html
• https://www.jetbrains.com/idea/download/#section=linux
• https://stackoverflow.com/questions/47748433/are-vs-code-keybindings-available-for-intellij-idea
• https://www.jetbrains.com/help/idea/mastering-keyboard-shortcuts.html#learn-shortcuts