kotlin

It makes me think whether Kotlin has enough added value to make people change from a safe haven like Java8 to Kotlin.

Kotlin has deconstruction: val (a,b,c) = myDataObject Their documentation did indeed commit this sin when I first started using Kotlin last year.

In Kotlin there's a bunch of null-handling operators, which allows you to really treat null as None.

Also Kotlin offers much more power in exploiting the features of those tools compared to Java.

The Kotlin type system does help though/is essential to correctly implement Option types where other languages like C# can not.

Sure, much better build times and less problems with code readability when using Akka, Play, Spark with Kotlin instead of Scala.

I doubt Kotlin will be able to deliver the same guarantees, but if it can, watch out Oracle.

Even if Spark did rely on Scala features that aren't in Kotlin (it doesn't), Spark is a library/framework/middleware completely unlike enterprise projects.

It's pretty likely that everything Kotlin does has been considered by Scala developers 5 years ago already–and discarded because better designs were discovered.

Both, methods and vars, in Kotlin interfaces can be public and also protected.

There is Quasar if you want Go or Erlang style concurrency in either Java or Kotlin (and the Pulsar wrapper to it for Clojure).

I had a nightmare in Java and Kotlin saved me, thanks to its smart import.

"Kotlin interfaces are essentially the same as Java interfaces." Interfaces in Kotlin offer functionality beyond interfaces in Java.

"Why not start with a mixed Java/Kotlin project?" Think that's a good idea.

> With the availability of Kotlin, Groovy or (somewhat limited I believe, but still) Scala on Android Did you mean " With the availability of Kotlin, (somewhat limited, but still) Groovy or (also somewhat limited I believe) Scala on Android "?

" "The final point is less obvious but still important: new programming languages is a topic that many people really enjoy talking about, and the first days that have passed since we’ve unveiled Kotlin prove that." "And we’d like to reiterate that our work on Kotlin does not in any way affect our investment into other development tools, and in particular the Scala plugin.

Kotlin can't quite do that because it relies on method handles and invokedynamic, which are missing from Android.

Kotlin seems to have a killer feature which is Android development, which is of course good.

None of those features (except sealed ADTs, which really aren't necessary) is missing from Kotlin.