Question
Share a modelling or transformation problem where stronger types could prevent mistakes. If you are coming from Python or Java, mention one Scala concept you want to understand through a concrete example.
1 answer
Scala's type system is most useful when invalid states can be excluded before runtime. Model meaningful concepts with case classes and enums instead of passing loose strings and maps. Start with a small domain object, make fields explicit, use immutable transformations, and let compiler errors show where a new case has not been handled.