Basic Scala Project

Project structure

Each project has these files/folders (when using sbt).

• build.sbt: Defines the project configuration and library dependencies
• src/main/scala: This contains all the project files. It can have sub-folders.
• src/test/scala: This contains test files.

Using sbt

To start sbt, just type sbt in the terminal from the "root" of your project (where the build.sbt file is located).

• compile: Runs the compiler and reports errors.
• run: Runs the def main function in the scala project. All computation must start in def main.
• ~compile: Add ~ to any command (run or compile) to make sbt automatically run it every time a file is saved inside src/main/scala.

Language constructs

TODO(yoona): Add explanations for the following language constructs.

• trait: trait is a collection of abstract and non-abstract methods which are used to share interface between classes
• sealed trait: when a trait is sealed, all the subtypes are declared and thus the pattern matching is comprehensive
• case class: case class is a special type of class which have special methods by default. Case classes are useful for pattern matching as it specifies the cases of pattern matching the instance.
• Seq: iterable that has length and can be accessed with indices.
• .mkString method: is a scala method that help you create a String representation of collection elements by iterating through the collection
• anything else