Hacker News Reader

No. Swift doesn't have traits. It has protocols but these can't currently contain implementation.

Implementation is currently strictly based on single inheritance with open classes (through extension).

This might be helpful - https://leverich.github.io/swiftislikescala/#protocol

Thanks for that, interesting comparison.

Extensive usage of var in the examples, that's not suggested best practice in Scala, val is king, but I guess for one-to-one comparison each language does indeed express mutability similarly.

`return` is implicit if expression is the last in a block, so none of the `return` statements on the Scala side are needed.

Pretty interesting grab bag of functionality, I'm seeing a lot of Scala, but then bits of Python, Groovy, and Kotlin (extension methods) as well.

I'm not that familiar with Scala, but aren't traits basically interfaces? I imagine Swift's protocols are the same deal.