Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Plain View
Kafka, mail # user - scala questions


+
Rob Withers 2013-05-17, 23:48
Copy link to this message
-
Re: scala questions
Jun Rao 2013-05-18, 03:44
Scala compiles to java bytecode. You can use java objects in scala and vice
versa.

Thanks,

Jun
On Fri, May 17, 2013 at 4:48 PM, Rob Withers <[EMAIL PROTECTED]> wrote:

> I've gotten to know y'all a bit, so I would like to ask my question here.
>  :)
>
> I am fairly unfamiliar with Scala, having worked a chapter or 2 out of a
> scala book I bought.  My understanding is that it is both an object
> language and a functional language.  The only language I am extremely
> familiar with, that is this way, is Smalltalk.  Smalltalk is a dynamic
> late-binding, strongly-typed language.  My understanding is scala is a
> explicitly typed language, but does this mean it is a static, early-binding
> language?
>
> Closures, and I suppose functions, must be or optionally could be compiled
> at runtime.  Are they?  I realize they capture their environment at
> creation-time (runtime), but does that mean the code gets compiled to byte
> code at that time, or is it possible to use a Mirror to compile it at
> runtime?  It is extremely important to be able to do this, for me, and I am
> pretty sure it can do this.  I mean, duh!
>
> I think scala has immutable objects, is it so?  Apria?   so, my question:
> what about object references?  Can they be mutable by choice?  Here's what
> I need, and I need a language that supports it, and if that language is
> callable from  java, then I can support this feature on the jvm, callable
> by java and groovy.  I would rather they be implemented in scala, due to
> performance, unless scala already has the feature.
>
> Mutability is required for a reference mutation from an eventual reference
> to a stable reference or a broken reference.  It is useful to not require a
> wrapper around a mutable ref.  Does scala have an any type, with
> polymorphic runtime dispatch?
>
> Is there a cross-compiler that will convert java to scala?
>
> thank you for your responses,
> rob