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Kotlin 1.1 Released with JavaScript Support, Coroutines and more

blog.jetbrains.com

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Re: Kotlin 1.1 Released with JavaScript Support, Coroutines and more

#2

Post by grabcocque »

What I like about Kotlin is it's what you might call a "pragmatic Scala", and could find a sweet spot between Java and Scala where its added expressiveness allows it to shine, but Scala's complexity and performance issues aren't in evidence to scare the development managers into staying with Java.

Re: Kotlin 1.1 Released with JavaScript Support, Coroutines and more

#3

Post by Scarbutt »

grabcocque wrote: post #2

What I like about Kotlin is it's what you might call a "pragmatic Scala", and could find a sweet spot between Java and Scala where its added expressiveness allows it to shine, but Scala's complexity and performance issues aren't in evidence to scare the development managers into staying with Java.

Scala's complexity and performance issues

Is Kotlin really faster than Scala?

Re: Kotlin 1.1 Released with JavaScript Support, Coroutines and more

#5

Post by grabcocque »

Scarbutt wrote: post #3
grabcocque wrote: post #2

What I like about Kotlin is it's what you might call a "pragmatic Scala", and could find a sweet spot between Java and Scala where its added expressiveness allows it to shine, but Scala's complexity and performance issues aren't in evidence to scare the development managers into staying with Java.

Scala's complexity and performance issues Is Kotlin really faster than Scala?

Scala's build times are legendarily horrible. Kotlin has similar compile times to Javac.

Re: Kotlin 1.1 Released with JavaScript Support, Coroutines and more

#8

Post by pjmlp »

grabcocque wrote: post #5
Scarbutt wrote: post #3

Earlier quoted context omitted.

Scala's complexity and performance issues Is Kotlin really faster than Scala?

Scala's build times are legendarily horrible. Kotlin has similar compile times to Javac.

They are working on improving them though, specially with Dotty.

In any case they aren't as bad as C++ (at least until modules arrive).

Re: Kotlin 1.1 Released with JavaScript Support, Coroutines and more

#9

Post by WkndTriathlete »

A few weeks ago I wrote the same application four times in four different JVM languages: Java, Groovy, Scala, and Kotlin, with a particular focus on the application using functional techniques and types as well as being reactive. I also included as goals complete test coverage with a preferred test framework from each language and complete build tooling, all within a single Gradle project.

The only significant sources of variance were the following:

a) Groovy's support for functional programming is starting to show its age. It worked with everything, though.

b) The Scala 2.12 compiler has at least one bug that appears to affect its interaction with Java 8 lambdas (in particular, in at least one case expr.method() and (expr).method() will not pass the compiler's typecheck, but { val x = expr; x.method() } does. (All three pass IntelliJ's typechecker for Scala.) Outside of this (aggravating) issue and slower build times, it did work.

c) Java works well with everything but ends up being quite verbose, especially in regards to a functional programming style (no surprise there).

d) Kotlin (1.0) works well with everything and is relatively succinct except for Mockito due to everything defaulting to 'final' - but it appears that Kotlin 1.1 fixes this with a compiler plugin.

Based on my experience with all four languages, I would definitely try adding Kotlin to projects. It seems to be surprisingly mature and stable given how much less time it has spent in development (relative to the other three languages.)

Re: Kotlin 1.1 Released with JavaScript Support, Coroutines and more

#10

Post by Larrikin »

agumonkey wrote: post #6
meddlepal wrote: post #4

I've been very happy writing Kotlin backend code for the last fourteen months or so. Definitely excited. It's an awesome JVM language.

I'm investigating Kotlin. Do you have references, blogs etc to suggest ?

Through this blog https://antonioleiva.com/kotlin/ And his book I was able to become fairly productive in the language in only a few weeks. I was familiar with Scala however. The automatic conversion of java to Kotlin in Intelli J's IDEs also helped immensely.
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