IMO the main thing scala has going for it is Play/Akka….
I keep more and more play mentions at meetups/hacker news/etc. It seems to
be gaining traction
On Sun, Feb 16, 2014 at 10:44 PM, Cédric Beust ♔ <ced...@beust.com> wrote:
> On Sun, Feb 16, 2014 at 8:57 PM, clay <claytonw...@gmail.com> wrote:
>
>
>> Kotlin is odd in that it is extremely Scala-like and looks like it was
>> created as a reaction to a few gripes with Scala such as compilation speed
>> and better IDE toolability.
>>
> To me, Kotlin is much closer to Java than Scala. It’s really the very
> definition of an incremental improvement over Java: lambdas, extension
> methods, properties, a few things that are quite unique to it, such as
> delegated properties (which are very interesting beasts) and syntactic
> sugar.
>
> Ceylon is more in the middle between Java and Scala. It’s a much more
> ambitious effort to improve over Java and it’s a language that is not
> afraid of redefining the game (and using different keywords in the
> process). Its greatest and most innovative contribution to the language
> field is its native support for union and intersection types, something
> which I am very excited about. From this simple concept flow some very
> powerful type properties that solve a lot of the problems that languages
> that have to deal with variance and subtyping have never been able to solve
> cleanly (I’m including Java, Scala and Kotlin in this generalization).
>
> For example, in Scala, the type of List(1, "a") is List[Any], while in
> Ceylon, it’s a fully typed tuple. Similarly, the most specific common
> subtype of List(1) and List("a") is List[Any] in Scala and
> List[Int|String] in Ceylon, arguably the best type you can infer.
>
> Null support flows very naturally from union types as well, so that a
> nullable value has the type Foo|Null and it can’t be assigned to a Foountil
> you explicitly make sure it’s not of type
> Null.
>
> I’m very much looking forward to the next couple of years, when we start
> getting a better idea where the JVM is headed once the fight between Java
> 8, Scala, Kotlin and Ceylon start shaking itself out.
> --
> Cédric
>
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