Oh, sorry, I think your point was probably you wouldn't need runtime
allocation.
I guess that is the key question. I would be interested if this works for
you.
-Suren
On Sun, Apr 20, 2014 at 9:18 AM, Surendranauth Hiraman <
suren.hira...@velos.io> wrote:
> If the purpose is only aliasing, rather than adding additional methods and
> avoiding runtime allocation, what about type aliases?
>
> type ID = String
> type Name = String
>
>
> On Sat, Apr 19, 2014 at 9:26 PM, kamatsuoka <ken...@gmail.com> wrote:
>
>> No, you can wrap other types in value classes as well. You can try it in
>> the REPL:
>>
>> scala> case class ID(val id: String) extends AnyVal
>> defined class ID
>> scala> val i = ID("foo")
>> i: ID = ID(foo)
>>
>>
>> On Fri, Apr 18, 2014 at 4:14 PM, Koert Kuipers [via Apache Spark User
>> List] <[hidden email] <http://user/SendEmail.jtp?type=node&node=4494&i=0>
>> > wrote:
>>
>>> isn't valueclasses for primitives (AnyVal) only? that doesn't apply to
>>> string, which is an object (AnyRef)
>>>
>>>
>>> On Fri, Apr 18, 2014 at 2:51 PM, kamatsuoka <[hidden
>>> email]<http://user/SendEmail.jtp?type=node&node=4475&i=0>
>>> > wrote:
>>>
>>>> I'm wondering if anyone has tried using value classes in RDDs? My use
>>>> case
>>>> is that I have a number of RDDs containing strings, e.g.
>>>>
>>>> val r1: RDD[(String, (String, Int)] = ...
>>>> val r2: RDD[(String, (String, Int)] = ...
>>>>
>>>> and it might be clearer if I wrote
>>>>
>>>> case class ID(val id: String) extends AnyVal
>>>> case class Name(val id: String) extends AnyVal
>>>> val r1: RDD[(ID, (Name, Int)] = ...
>>>> val r2: RDD[(Name, (ID, Int)] = ...
>>>>
>>>> This seems like a pretty typical use case for value classes, but I
>>>> haven't
>>>> noticed anyone talking about it. Although, I think you'd have to read
>>>> through all of the Spark code paths to know whether allocation is
>>>> required
>>>> (http://docs.scala-lang.org/overviews/core/value-classes.html), so some
>>>> comparative performance testing would be called for.
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>> http://apache-spark-user-list.1001560.n3.nabble.com/Anyone-using-value-classes-in-RDDs-tp4464.html
>>>> Sent from the Apache Spark User List mailing list archive at Nabble.com.
>>>>
>>>
>>>
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>>
>>
>> --
>> Kenji
>>
>> ------------------------------
>> View this message in context: Re: Anyone using value classes in
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>
>
>
> --
>
> SUREN HIRAMAN, VP TECHNOLOGY
> Velos
> Accelerating Machine Learning
>
> 440 NINTH AVENUE, 11TH FLOOR
> NEW YORK, NY 10001
> O: (917) 525-2466 ext. 105
> F: 646.349.4063
> E: suren.hiraman@v <suren.hira...@sociocast.com>elos.io
> W: www.velos.io
>
>
--
SUREN HIRAMAN, VP TECHNOLOGY
Velos
Accelerating Machine Learning
440 NINTH AVENUE, 11TH FLOOR
NEW YORK, NY 10001
O: (917) 525-2466 ext. 105
F: 646.349.4063
E: suren.hiraman@v <suren.hira...@sociocast.com>elos.io
W: www.velos.io
