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From Kostas Tzoumas <ktzou...@apache.org>
Subject Re: Scala API rewrite almost complete
Date Sun, 14 Sep 2014 09:14:46 GMT
Good catch, I suggest to use examples

On Sat, Sep 13, 2014 at 3:27 PM, Márton Balassi <balassi.marton@gmail.com>
wrote:

> Pull request issued. One minor naming concern:
>
> As of today the scala examples are located at
> the org.apache.flink.examples.scala package, while the java ones in
> the org.apache.flink.example.java. I suggest using only one convention for
> this either example or examples.
>
> Cheers,
>
> Marton
>
> On Fri, Sep 12, 2014 at 9:17 PM, Márton Balassi <balassi.marton@gmail.com>
> wrote:
>
> > Sorry for being a bit silent after already bidding on LR. The pull
> request
> > is coming soon.
> >
> > On Fri, Sep 12, 2014 at 6:25 PM, Stephan Ewen <sewen@apache.org> wrote:
> >
> >> I suppose that having the option between simple return type, and a
> >> collector is the easiest to understand.
> >>  Am 12.09.2014 16:50 schrieb "Aljoscha Krettek" <aljoscha@apache.org>:
> >>
> >> > So, should I change join and coGroup to have a simple return value, no
> >> > Option or Collection? Also what's happening with the relational
> >> > examples and the LinearRegression examples? I'd like to make a pull
> >> > request before this weekend.
> >> >
> >> > I also added a test that checks whether the Scala API has the same
> >> > methods as the Java API (ScalaAPICompletenessTest).
> >> >
> >> > On Fri, Sep 12, 2014 at 4:00 PM, Aljoscha Krettek <
> aljoscha@apache.org>
> >> > wrote:
> >> > > Yes, there is already a Collector version, you can do:
> >> > >
> >> > > left.join(right).where("foo").equalTo("bar") {
> >> > >   (left, right, out: Collector[Page]) =>
> >> > >     if (...) out.collect(...)
> >> > > }
> >> > >
> >> > > I wasn't sure on what our Function2 variant should be. That's why I
> >> > > asked. There are some cases where you want to have the option (pun
> >> > > intended) of either returning something from a join or not. But you
> >> > > could also use a filter after the join. It's a preference thing, I
> >> > > suppose.
> >> > >
> >> > > On Fri, Sep 12, 2014 at 2:43 PM, Stephan Ewen <sewen@apache.org>
> >> wrote:
> >> > >> I think it seems weird that normal joins need to go through option.
> >> > >>
> >> > >> The option variant is to allow filters in the join function.
> >> Wouldn't a
> >> > >> collector variant allow you to do the same, and would be function3
> ?
> >> I
> >> > know
> >> > >> that option reads more functionally...
> >> > >>
> >> > >>
> >> > >>
> >> > >> Am 12.09.2014 14:24 schrieb "Aljoscha Krettek" <
> aljoscha@apache.org
> >> >:
> >> > >>>
> >> > >>> As already mentioned this is not possible because of type erasure.
> >> We
> >> > >>> can only have one join variant that takes a Function2.
> >> > >>>
> >> > >>> On Fri, Sep 12, 2014 at 12:34 PM, Stephan Ewen <sewen@apache.org>
> >> > wrote:
> >> > >>> > It would be nice to have a join variant that directly returns
> the
> >> > value
> >> > >>> > rathern than an option. Why not have both (they are wrapped as
> >> > flatJoins
> >> > >>> > anyway below, right?)
> >> > >>> >
> >> > >>> > On Fri, Sep 12, 2014 at 11:50 AM, Fabian Hueske <
> >> fhueske@apache.org>
> >> > >> wrote:
> >> > >>> >
> >> > >>> >> Sweet! I'm lovin' this :-)
> >> > >>> >>
> >> > >>> >> 2014-09-12 11:46 GMT+02:00 Aljoscha Krettek <
> aljoscha@apache.org
> >> >:
> >> > >>> >>
> >> > >>> >> > Also, you can use CaseClasses directly as the type for CSV
> >> input.
> >> > So
> >> > >>> >> > instead of reading it as tuples and then having a mapper that
> >> > maps to
> >> > >>> >> > your case classes you can use:
> >> > >>> >> >
> >> > >>> >> > env.readCsv[Edge](...)
> >> > >>> >> >
> >> > >>> >> > On Fri, Sep 12, 2014 at 11:43 AM, Aljoscha Krettek <
> >> > >> aljoscha@apache.org>
> >> > >>> >> > wrote:
> >> > >>> >> > > I added support for specifying keys by name for
> CaseClasses.
> >> > Check
> >> > >> out
> >> > >>> >> > > the PageRank and TriangleEnumeration examples to see it in
> >> > action.
> >> > >>> >> > >
> >> > >>> >> > > @Kostas: I think you could use them for the TPC-H examples.
> >> > >>> >> > >
> >> > >>> >> > > On Fri, Sep 12, 2014 at 7:23 AM, Aljoscha Krettek <
> >> > >> aljoscha@apache.org
> >> > >>> >> >
> >> > >>> >> > wrote:
> >> > >>> >> > >> Yes, that would allow list comprehensions. It would be
> >> > possible to
> >> > >>> >> > >> have the Collection signature for join (and coGroup),
> i.e.:
> >> > >>> >> > >>
> >> > >>> >> > >> apply[R]((T, O) => TraversableOnce[O]): DataSet[O]
> >> > >>> >> > >>
> >> > >>> >> > >> (T and O are the left and right input type, R is result
> >> type)
> >> > >>> >> > >>
> >> > >>> >> > >> Then you can return collections and still return an
> option,
> >> as
> >> > in:
> >> > >>> >> > >>
> >> > >>> >> > >> a.join(b).where(0).equalTo(0) { (l, r) => if (r > ...)
> >> Some(l)
> >> > >> else
> >> > >>> >> > None }
> >> > >>> >> > >>
> >> > >>> >> > >> Because there is an implicit conversion from Options to a
> >> > >> Collection.
> >> > >>> >> > >> This will always wrap the return value in a List with only
> >> one
> >> > >> value.
> >> > >>> >> > >> I'm not sure we want the overhead here. I'm also not sure
> >> > whether
> >> > >> we
> >> > >>> >> > >> want the overhead of always having to use an Option even
> >> though
> >> > >> the
> >> > >>> >> > >> join always returns a value.
> >> > >>> >> > >>
> >> > >>> >> > >> What do you think?
> >> > >>> >> > >>
> >> > >>> >> > >> On Thu, Sep 11, 2014 at 11:22 PM, Fabian Hueske <
> >> > >> fhueske@apache.org>
> >> > >>> >> > wrote:
> >> > >>> >> > >>> Hmmm, tricky question...
> >> > >>> >> > >>> How about the Option for Join as this is a tuple-wise
> >> > operation
> >> > >> and
> >> > >>> >> the
> >> > >>> >> > >>> Collection for Cogroup which is group-wise?
> >> > >>> >> > >>> Could we in that case use list comprehensions in Cogroup
> >> > >> functions?
> >> > >>> >> > >>>
> >> > >>> >> > >>> Or is that too much mixing?
> >> > >>> >> > >>>
> >> > >>> >> > >>> 2014-09-11 23:00 GMT+02:00 Aljoscha Krettek <
> >> > aljoscha@apache.org
> >> > >>>:
> >> > >>> >> > >>>
> >> > >>> >> > >>>> I didn't look at the example either.
> >> > >>> >> > >>>>
> >> > >>> >> > >>>> Addings collections is easy, it's just that we can
> either
> >> > have
> >> > >>> >> > >>>> Collections or the Option, not both.
> >> > >>> >> > >>>>
> >> > >>> >> > >>>> For the coding style I followed this:
> >> > >>> >> > >>>>
> >> > >>> >> >
> >> > >>
> >> >
> >>
> https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide
> >> > >>> >> ,
> >> > >>> >> > >>>> which itself is based on this:
> >> > http://docs.scala-lang.org/style/
> >> > >> .
> >> > >>> >> It
> >> > >>> >> > >>>> is different from the Java Code Guidelines we have in
> >> place,
> >> > >> yes.
> >> > >>> >> > >>>>
> >> > >>> >> > >>>> On Thu, Sep 11, 2014 at 10:10 PM, Fabian Hueske <
> >> > >> fhueske@apache.org
> >> > >>> >> >
> >> > >>> >> > >>>> wrote:
> >> > >>> >> > >>>> > I haven't looked at the LineRank example in detail,
> but
> >> if
> >> > you
> >> > >>> >> > think that
> >> > >>> >> > >>>> > it adds something new to the examples collection, we
> can
> >> > >> certainly
> >> > >>> >> > port
> >> > >>> >> > >>>> it
> >> > >>> >> > >>>> > also to Java.
> >> > >>> >> > >>>> > I think the Option and Collector return types are
> >> > sufficient
> >> > >> right
> >> > >>> >> > now
> >> > >>> >> > >>>> but
> >> > >>> >> > >>>> > if Collections are easy to add, go for it. ;-)
> >> > >>> >> > >>>> >
> >> > >>> >> > >>>> > Great that the Scala primitives are working! Also
> thanks
> >> > for
> >> > >>> >> adding
> >> > >>> >> > >>>> > genSequence and adapting my examples.
> >> > >>> >> > >>>> > Btw. does the codestyle not apply for Scala files or
> do
> >> we
> >> > >> have a
> >> > >>> >> > >>>> different
> >> > >>> >> > >>>> > there?
> >> > >>> >> > >>>> >
> >> > >>> >> > >>>> > 2014-09-11 17:55 GMT+02:00 Aljoscha Krettek <
> >> > >> aljoscha@apache.org
> >> > >>> >> >:
> >> > >>> >> > >>>> >
> >> > >>> >> > >>>> >> What about the LineRank example? We had that in Scala
> >> but
> >> > >> never
> >> > >>> >> > had a
> >> > >>> >> > >>>> >> Java Example.
> >> > >>> >> > >>>> >>
> >> > >>> >> > >>>> >> On Thu, Sep 11, 2014 at 5:51 PM, Aljoscha Krettek <
> >> > >>> >> > aljoscha@apache.org>
> >> > >>> >> > >>>> >> wrote:
> >> > >>> >> > >>>> >> > Yes, I like that. For the ITCases I always just
> >> copied
> >> > the
> >> > >> Java
> >> > >>> >> > >>>> ITCase.
> >> > >>> >> > >>>> >> >
> >> > >>> >> > >>>> >> > The only examples that are missing now are
> >> > >> LinearRegression and
> >> > >>> >> > the
> >> > >>> >> > >>>> >> > relational stuff.
> >> > >>> >> > >>>> >> >
> >> > >>> >> > >>>> >> > On Thu, Sep 11, 2014 at 5:48 PM, Fabian Hueske <
> >> > >>> >> > fhueske@apache.org>
> >> > >>> >> > >>>> >> wrote:
> >> > >>> >> > >>>> >> >> I just removed the old CountEdgeDegrees example.
> >> > >>> >> > >>>> >> >> That was a preprocessing step for the
> >> > >> TriangleEnumeration, and
> >> > >>> >> > is now
> >> > >>> >> > >>>> >> part
> >> > >>> >> > >>>> >> >> of the new TriangleEnumerationOpt example.
> >> > >>> >> > >>>> >> >> So I guess, we don't need to port that one. As I
> >> said
> >> > >> before,
> >> > >>> >> > I'd
> >> > >>> >> > >>>> >> prefer to
> >> > >>> >> > >>>> >> >> keep Java and Scala examples in sync.
> >> > >>> >> > >>>> >> >>
> >> > >>> >> > >>>> >> >> Cheers, Fabian
> >> > >>> >> > >>>> >> >>
> >> > >>> >> > >>>> >> >> 2014-09-11 17:40 GMT+02:00 Aljoscha Krettek <
> >> > >>> >> > aljoscha@apache.org>:
> >> > >>> >> > >>>> >> >>
> >> > >>> >> > >>>> >> >>> I added the PageRank example, thanks again
> fabian.
> >> :D
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >> >>> Regarding the other stuff:
> >> > >>> >> > >>>> >> >>>  - There is a comment in DataSet.scala about
> >> including
> >> > >>> >> > >>>> >> >>> org.apache.flink.api.scala._ because of the
> >> > >> TypeInformation.
> >> > >>> >> > >>>> >> >>>  - I added generateSequence to
> >> ExecutionEnvironment.
> >> > >>> >> > >>>> >> >>>  - It is possible to use Scala Primitives in
> >> Array, I
> >> > >> noticed
> >> > >>> >> > it
> >> > >>> >> > >>>> while
> >> > >>> >> > >>>> >> >>> writing the tests, you probably had an older
> >> version
> >> > of
> >> > >> the
> >> > >>> >> > code.
> >> > >>> >> > >>>> >> >>>  - Yes, using List and other Interfaces is not
> >> > possible,
> >> > >> this
> >> > >>> >> > is
> >> > >>> >> > >>>> also
> >> > >>> >> > >>>> >> >>> a restriction in the Java API.
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >> >>> What do you think about the interface of join and
> >> > >> coGroup?
> >> > >>> >> > Right
> >> > >>> >> > >>>> now,
> >> > >>> >> > >>>> >> >>> you can either use a lambda that returns an
> Option
> >> or
> >> > the
> >> > >>> >> > lambda
> >> > >>> >> > >>>> with
> >> > >>> >> > >>>> >> >>> the Collector. Originally I wanted to have also
> >> have a
> >> > >> lambda
> >> > >>> >> > that
> >> > >>> >> > >>>> >> >>> returns a Collection, but due to type erasure
> this
> >> has
> >> > >> the
> >> > >>> >> > same type
> >> > >>> >> > >>>> >> >>> as the lambda with the Option so I couldn't use
> it.
> >> > >> There is
> >> > >>> >> an
> >> > >>> >> > >>>> >> >>> implicit conversion from Option to a Collection,
> >> so I
> >> > >> could
> >> > >>> >> > change
> >> > >>> >> > >>>> it
> >> > >>> >> > >>>> >> >>> without breaking the examples we have now. What
> do
> >> you
> >> > >> think?
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >> >>> So far we have ported: WordCount, KMeans,
> >> > >>> >> ConnectedComponents,
> >> > >>> >> > >>>> >> >>> WebLogAnalysis, TransitiveClosureNaive,
> >> > >>> >> > >>>> TriangleEnumerationNaive/Opt,
> >> > >>> >> > >>>> >> >>> PageRank
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >> >>> These are the examples people called dibs on:
> >> > >>> >> > >>>> >> >>>  - BatchGradientDescent (Márton) (Should be a
> port
> >> of
> >> > >>> >> > >>>> LinearRegression
> >> > >>> >> > >>>> >> >>> Example from Java)
> >> > >>> >> > >>>> >> >>>  - ComputeEdgeDegrees (Hermann)
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >> >>> Those are unclaimed (if I'm not mistaken):
> >> > >>> >> > >>>> >> >>>  - The relational Stuff
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >> >>> On Thu, Sep 11, 2014 at 3:06 PM, Stephan Ewen <
> >> > >>> >> > sewen@apache.org>
> >> > >>> >> > >>>> >> wrote:
> >> > >>> >> > >>>> >> >>> > +1 for removing RelationQuery
> >> > >>> >> > >>>> >> >>> >
> >> > >>> >> > >>>> >> >>> > On Thu, Sep 11, 2014 at 3:04 PM, Aljoscha
> >> Krettek <
> >> > >>> >> > >>>> >> aljoscha@apache.org>
> >> > >>> >> > >>>> >> >>> > wrote:
> >> > >>> >> > >>>> >> >>> >
> >> > >>> >> > >>>> >> >>> >> By the way, what was called
> >> BatchGradientDescent in
> >> > >> the
> >> > >>> >> > Scala
> >> > >>> >> > >>>> >> examples
> >> > >>> >> > >>>> >> >>> >> should be replaced by a port of the
> >> > LinearRegression
> >> > >>> >> > Example from
> >> > >>> >> > >>>> >> >>> >> Java. I had them as two separate examples
> >> earlier.
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> > >>>> >> >>> >> What about RelationalQuery and TPC-H-Q3. Any
> >> > thoughts
> >> > >>> >> about
> >> > >>> >> > >>>> removing
> >> > >>> >> > >>>> >> >>> >> RelationalQuery?
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> > >>>> >> >>> >> On Thu, Sep 11, 2014 at 11:43 AM, Aljoscha
> >> Krettek
> >> > <
> >> > >>> >> > >>>> >> aljoscha@apache.org
> >> > >>> >> > >>>> >> >>> >
> >> > >>> >> > >>>> >> >>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> > I added the Triangle Enumeration Examples,
> >> thanks
> >> > >>> >> Fabian.
> >> > >>> >> > >>>> >> >>> >> >
> >> > >>> >> > >>>> >> >>> >> > So far we have ported: WordCount, KMeans,
> >> > >>> >> > ConnectedComponents,
> >> > >>> >> > >>>> >> >>> >> > WebLogAnalysis, TransitiveClosureNaive,
> >> > >>> >> > >>>> >> TriangleEnumerationNaive/Opt
> >> > >>> >> > >>>> >> >>> >> >
> >> > >>> >> > >>>> >> >>> >> > These are the examples people called dibs
> on:
> >> > >>> >> > >>>> >> >>> >> >  - PageRank (Fabian)
> >> > >>> >> > >>>> >> >>> >> >  - BatchGradientDescent (Márton)
> >> > >>> >> > >>>> >> >>> >> >  - ComputeEdgeDegrees (Hermann)
> >> > >>> >> > >>>> >> >>> >> >
> >> > >>> >> > >>>> >> >>> >> > Those are unclaimed (if I'm not mistaken):
> >> > >>> >> > >>>> >> >>> >> >  - The relational Stuff
> >> > >>> >> > >>>> >> >>> >> >  - LinearRegression
> >> > >>> >> > >>>> >> >>> >> >
> >> > >>> >> > >>>> >> >>> >> > On Wed, Sep 10, 2014 at 6:04 PM, Aljoscha
> >> > Krettek <
> >> > >>> >> > >>>> >> >>> aljoscha@apache.org>
> >> > >>> >> > >>>> >> >>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >> Thanks, I added it. I'll keep a running
> list
> >> of
> >> > >>> >> > >>>> ported/unported
> >> > >>> >> > >>>> >> >>> >> >> examples in my mails. I'll rename the java
> >> > example
> >> > >>> >> > package to
> >> > >>> >> > >>>> >> >>> examples
> >> > >>> >> > >>>> >> >>> >> >> once the Scala API merge is done.
> >> > >>> >> > >>>> >> >>> >> >>
> >> > >>> >> > >>>> >> >>> >> >> I think the termination criterion is fine
> as
> >> it
> >> > is.
> >> > >>> >> Just
> >> > >>> >> > >>>> because
> >> > >>> >> > >>>> >> >>> Scala
> >> > >>> >> > >>>> >> >>> >> >> enables functional programming doesn't mean
> >> it's
> >> > >> always
> >> > >>> >> > the
> >> > >>> >> > >>>> best
> >> > >>> >> > >>>> >> >>> >> >> choice. :D
> >> > >>> >> > >>>> >> >>> >> >>
> >> > >>> >> > >>>> >> >>> >> >> So far we have ported: WordCount, KMeans,
> >> > >>> >> > ConnectedComponents,
> >> > >>> >> > >>>> >> >>> >> >> WebLogAnalysis, TransitiveClosureNaive
> >> > >>> >> > >>>> >> >>> >> >>
> >> > >>> >> > >>>> >> >>> >> >> These are the examples people called dibs
> on:
> >> > >>> >> > >>>> >> >>> >> >>  - TriangleEnumration and PageRank (Fabian)
> >> > >>> >> > >>>> >> >>> >> >>  - BatchGradientDescent (Márton)
> >> > >>> >> > >>>> >> >>> >> >>  - ComputeEdgeDegrees (Hermann)
> >> > >>> >> > >>>> >> >>> >> >>
> >> > >>> >> > >>>> >> >>> >> >> Those are unclaimed (if I'm not mistaken):
> >> > >>> >> > >>>> >> >>> >> >>  - The relational Stuff
> >> > >>> >> > >>>> >> >>> >> >>  - LinearRegression
> >> > >>> >> > >>>> >> >>> >> >>
> >> > >>> >> > >>>> >> >>> >> >> Cheers,
> >> > >>> >> > >>>> >> >>> >> >> Aljoscha
> >> > >>> >> > >>>> >> >>> >> >>
> >> > >>> >> > >>>> >> >>> >> >> On Wed, Sep 10, 2014 at 4:23 PM, Kostas
> >> Tzoumas
> >> > <
> >> > >>> >> > >>>> >> ktzoumas@apache.org
> >> > >>> >> > >>>> >> >>> >
> >> > >>> >> > >>>> >> >>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>> Transitive closure here, I also added a
> >> > >> termination
> >> > >>> >> > criterion
> >> > >>> >> > >>>> >> in the
> >> > >>> >> > >>>> >> >>> >> Java
> >> > >>> >> > >>>> >> >>> >> >>> version:
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> > >>>>
> >> > >> https://github.com/ktzoumas/incubator-flink/tree/tc-scala-example
> >> > >>> >> > >>>> >> >>> >> >>>
> >> > >>> >> > >>>> >> >>> >> >>> Perhaps you can make the termination
> >> criterion
> >> > in
> >> > >>> >> Scala
> >> > >>> >> > more
> >> > >>> >> > >>>> >> >>> >> functional?
> >> > >>> >> > >>>> >> >>> >> >>>
> >> > >>> >> > >>>> >> >>> >> >>> I noticed that the examples package name
> is
> >> > >>> >> > example.java but
> >> > >>> >> > >>>> >> >>> >> examples.scala
> >> > >>> >> > >>>> >> >>> >> >>>
> >> > >>> >> > >>>> >> >>> >> >>> Kostas
> >> > >>> >> > >>>> >> >>> >> >>>
> >> > >>> >> > >>>> >> >>> >> >>> On Tue, Sep 9, 2014 at 6:12 PM, Kostas
> >> Tzoumas
> >> > <
> >> > >>> >> > >>>> >> ktzoumas@apache.org
> >> > >>> >> > >>>> >> >>> >
> >> > >>> >> > >>>> >> >>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>> I'll take TransitiveClosure and
> >> PiEstimation
> >> > >> (was not
> >> > >>> >> > on
> >> > >>> >> > >>>> your
> >> > >>> >> > >>>> >> >>> list).
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>> If nobody volunteers for the relational
> >> stuff
> >> > I
> >> > >> can
> >> > >>> >> > take
> >> > >>> >> > >>>> those
> >> > >>> >> > >>>> >> as
> >> > >>> >> > >>>> >> >>> >> well.
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>> How about removing the "RelationalQuery"
> >> from
> >> > >> both
> >> > >>> >> > Scala and
> >> > >>> >> > >>>> >> Java?
> >> > >>> >> > >>>> >> >>> It
> >> > >>> >> > >>>> >> >>> >> >>>> seems to be a proper subset of TPC-H Q3.
> >> Does
> >> > it
> >> > >> add
> >> > >>> >> > some
> >> > >>> >> > >>>> >> teaching
> >> > >>> >> > >>>> >> >>> >> value on
> >> > >>> >> > >>>> >> >>> >> >>>> top of TPC-H Q3?
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>> Kostas
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>> On Tue, Sep 9, 2014 at 5:57 PM, Aljoscha
> >> > Krettek
> >> > >> <
> >> > >>> >> > >>>> >> >>> aljoscha@apache.org
> >> > >>> >> > >>>> >> >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>>
> >> > >>> >> > >>>> >> >>> >> >>>>> Thanks, I added it, along with an
> ITCase.
> >> > >>> >> > >>>> >> >>> >> >>>>>
> >> > >>> >> > >>>> >> >>> >> >>>>> So far we have ported: WordCount,
> KMeans,
> >> > >>> >> > >>>> ConnectedComponents,
> >> > >>> >> > >>>> >> >>> >> >>>>> WebLogAnalysis
> >> > >>> >> > >>>> >> >>> >> >>>>>
> >> > >>> >> > >>>> >> >>> >> >>>>> These are the examples people called
> dibs
> >> on:
> >> > >>> >> > >>>> >> >>> >> >>>>>  - TriangleEnumration and PageRank
> >> (Fabian)
> >> > >>> >> > >>>> >> >>> >> >>>>>  - BatchGradientDescent (Márton)
> >> > >>> >> > >>>> >> >>> >> >>>>>  - ComputeEdgeDegrees (Hermann)
> >> > >>> >> > >>>> >> >>> >> >>>>>
> >> > >>> >> > >>>> >> >>> >> >>>>> Those are unclaimed (if I'm not
> mistaken):
> >> > >>> >> > >>>> >> >>> >> >>>>>  - TransitiveClosure
> >> > >>> >> > >>>> >> >>> >> >>>>>  - The relational Stuff
> >> > >>> >> > >>>> >> >>> >> >>>>>  - LinearRegression
> >> > >>> >> > >>>> >> >>> >> >>>>>
> >> > >>> >> > >>>> >> >>> >> >>>>> Cheers,
> >> > >>> >> > >>>> >> >>> >> >>>>> Aljoscha
> >> > >>> >> > >>>> >> >>> >> >>>>>
> >> > >>> >> > >>>> >> >>> >> >>>>> On Tue, Sep 9, 2014 at 5:21 PM, Kostas
> >> > Tzoumas <
> >> > >>> >> > >>>> >> >>> ktzoumas@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> > WebLog here:
> >> > >>> >> > >>>> >> >>> >> >>>>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >>
> >> > >>> >> > >>>>
> >> > >>> >> >
> >> > >>> >>
> >> > >>
> >> >
> >>
> https://github.com/ktzoumas/incubator-flink/tree/webloganalysis-example-scala
> >> > >>> >> > >>>> >> >>> >> >>>>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> > Do you need any more done?
> >> > >>> >> > >>>> >> >>> >> >>>>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> > On Tue, Sep 9, 2014 at 3:08 PM,
> Aljoscha
> >> > >> Krettek <
> >> > >>> >> > >>>> >> >>> >> aljoscha@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> > wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> I added the ConnectedComponents
> Example
> >> > from
> >> > >>> >> Vasia.
> >> > >>> >> > >>>> >> >>> >> >>>>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> Keep 'em coming, people. :D
> >> > >>> >> > >>>> >> >>> >> >>>>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> On Mon, Sep 8, 2014 at 6:07 PM,
> Fabian
> >> > >> Hueske <
> >> > >>> >> > >>>> >> >>> fhueske@apache.org
> >> > >>> >> > >>>> >> >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> > Alright, will do.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> > Thanks!
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> > 2014-09-08 17:48 GMT+02:00 Aljoscha
> >> > >> Krettek <
> >> > >>> >> > >>>> >> >>> >> aljoscha@apache.org>:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> Ok people, executive decision. :D
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> Please look at KMeansData.java and
> >> > >>> >> > KMeans.scala. I'm
> >> > >>> >> > >>>> >> storing
> >> > >>> >> > >>>> >> >>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> data
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> in multi-dimensional object arrays
> >> and
> >> > >> then
> >> > >>> >> > >>>> converting
> >> > >>> >> > >>>> >> it to
> >> > >>> >> > >>>> >> >>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> required Java or Scala objects.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> Also, I changed isEqualTo to
> >> equalTo to
> >> > >> make
> >> > >>> >> it
> >> > >>> >> > >>>> >> consistent
> >> > >>> >> > >>>> >> >>> >> with the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> Java
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> API.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> Regarding Join (and coGroup).
> There
> >> is
> >> > no
> >> > >> need
> >> > >>> >> > for a
> >> > >>> >> > >>>> >> >>> keyword,
> >> > >>> >> > >>>> >> >>> >> you
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> can
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> just write:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> left.join(right).where(0).equalTo(1) {
> >> > >> (le,
> >> > >>> >> re)
> >> > >>> >> > =>
> >> > >>> >> > >>>> new
> >> > >>> >> > >>>> >> >>> >> MyResult(le,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> re)
> >> > >>> >> > >>>> >> >>> >> >>>>> >> }
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> On Mon, Sep 8, 2014 at 2:07 PM,
> >> Fabian
> >> > >> Hueske
> >> > >>> >> <
> >> > >>> >> > >>>> >> >>> >> fhueske@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > Aside from the DataSet issue, I
> >> also
> >> > >> found
> >> > >>> >> an
> >> > >>> >> > >>>> >> >>> inconsistency
> >> > >>> >> > >>>> >> >>> >> with
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> Java
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > API. In Java join is done as:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> ds1.join(ds2).where(...).equalTo(...)
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > where in the current Scala this
> >> is:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > ds1.join(d2).where(...).isEqualTo(...)
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > isEqualTo() should be renamed to
> >> > >> equalTo(),
> >> > >>> >> > IMO.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > Also, join (+cross and coGroup?)
> >> > lacks
> >> > >> the
> >> > >>> >> > with()
> >> > >>> >> > >>>> >> method
> >> > >>> >> > >>>> >> >>> >> because
> >> > >>> >> > >>>> >> >>> >> >>>>> >> "with"
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> is
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > a keyword in Scala. Should be
> >> offer
> >> > >>> >> something
> >> > >>> >> > >>>> similar
> >> > >>> >> > >>>> >> for
> >> > >>> >> > >>>> >> >>> >> Scala
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > or go
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> with
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > map() on Tuple2(left, right)?
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> > 2014-09-08 13:51 GMT+02:00
> Stephan
> >> > Ewen
> >> > >> <
> >> > >>> >> > >>>> >> sewen@apache.org
> >> > >>> >> > >>>> >> >>> >:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> Instead of Strings, Object[][]
> >> would
> >> > >> work
> >> > >>> >> as
> >> > >>> >> > well.
> >> > >>> >> > >>>> >> That
> >> > >>> >> > >>>> >> >>> is a
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> generic
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> representation of a Tuple.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> Alternatively, they could be
> >> stored
> >> > as
> >> > >> Java
> >> > >>> >> > or
> >> > >>> >> > >>>> Scala
> >> > >>> >> > >>>> >> >>> Tuples,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> with a
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> generic
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> utility method to convert
> between
> >> > the
> >> > >> two.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> On Mon, Sep 8, 2014 at 10:55
> AM,
> >> > Fabian
> >> > >>> >> > Hueske
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> <fhueske@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > Yeah, I ran into the same
> >> > problem...
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > +1 for using Strings and
> >> parsing
> >> > >> them,
> >> > >>> >> but
> >> > >>> >> > >>>> using
> >> > >>> >> > >>>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > CSVFormat
> >> > >>> >> > >>>> >> >>> >> >>>>> >> won't
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> work
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > because this is based on a
> >> > >>> >> FileInputFormat.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > So we would need to parse the
> >> > Strings
> >> > >>> >> > >>>> manually...
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > 2014-09-08 10:35 GMT+02:00
> >> > Aljoscha
> >> > >>> >> Krettek
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > <aljoscha@apache.org>:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > Hi,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > on second thought. Maybe we
> >> > should
> >> > >> just
> >> > >>> >> > change
> >> > >>> >> > >>>> >> all
> >> > >>> >> > >>>> >> >>> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > example
> >> > >>> >> > >>>> >> >>> >> >>>>> >> input
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > data to strings and use CSV
> >> > input
> >> > >>> >> > formats in
> >> > >>> >> > >>>> all
> >> > >>> >> > >>>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > examples.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> What
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> do
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > you think?
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > Cheers,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > Aljoscha
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > On Mon, Sep 8, 2014 at 7:46
> >> AM,
> >> > >>> >> Aljoscha
> >> > >>> >> > >>>> Krettek
> >> > >>> >> > >>>> >> <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> aljoscha@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > Hi,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > yes it's unfortunate that
> >> the
> >> > >> data
> >> > >>> >> > types are
> >> > >>> >> > >>>> >> >>> >> incompatible.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > I'm
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> afraid
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > you have to to what you
> >> > proposed:
> >> > >>> >> move
> >> > >>> >> > the
> >> > >>> >> > >>>> >> data to
> >> > >>> >> > >>>> >> >>> a
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > static
> >> > >>> >> > >>>> >> >>> >> >>>>> >> field
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> and
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > convert it in the
> >> > >>> >> > getDefaultEdgeDataSet()
> >> > >>> >> > >>>> >> method in
> >> > >>> >> > >>>> >> >>> >> Scala.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > It's
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> not
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > nice, but copying would
> >> > >> duplicate the
> >> > >>> >> > data
> >> > >>> >> > >>>> and
> >> > >>> >> > >>>> >> >>> make it
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > easier
> >> > >>> >> > >>>> >> >>> >> >>>>> >> for
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> it
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > to go out of sync in the
> >> Java
> >> > and
> >> > >>> >> Scala
> >> > >>> >> > >>>> >> versions.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > What do the others think?
> >> This
> >> > >> will
> >> > >>> >> > probably
> >> > >>> >> > >>>> >> occur
> >> > >>> >> > >>>> >> >>> in
> >> > >>> >> > >>>> >> >>> >> all
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> examples.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > Cheers,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > Aljoscha
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > On Sun, Sep 7, 2014 at
> >> 10:04
> >> > PM,
> >> > >>> >> > Vasiliki
> >> > >>> >> > >>>> >> Kalavri
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > > <
> vasilikikalavri@gmail.com
> >> >
> >> > >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Hey,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> I have ported the
> >> Connected
> >> > >>> >> Components
> >> > >>> >> > >>>> >> example,
> >> > >>> >> > >>>> >> >>> but
> >> > >>> >> > >>>> >> >>> >> I am
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> not
> >> > >>> >> > >>>> >> >>> >> >>>>> >> sure
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> how
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > to
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> reuse the example input
> >> data
> >> > >> from
> >> > >>> >> > >>>> >> java-examples.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> In the
> >> > ConnectedComponentsData
> >> > >>> >> class,
> >> > >>> >> > the
> >> > >>> >> > >>>> >> vertices
> >> > >>> >> > >>>> >> >>> >> and
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> edges
> >> > >>> >> > >>>> >> >>> >> >>>>> >> data
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> are
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> produced by the methods
> >> > >>> >> > >>>> >> getDefaultVertexDataSet()
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> and
> >> getDefaultEdgeDataSet(),
> >> > >> which
> >> > >>> >> > take
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> an
> >> > >>> >> > >>>> >> org.apache.flink.api.java.ExecutionEnvironment
> >> > >>> >> > >>>> >> >>> as
> >> > >>> >> > >>>> >> >>> >> >>>>> >> parameter.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> One way is to provide
> >> public
> >> > >> static
> >> > >>> >> > fields
> >> > >>> >> > >>>> >> (like
> >> > >>> >> > >>>> >> >>> in
> >> > >>> >> > >>>> >> >>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> WordCountData
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> class), but this
> >> introduces a
> >> > >>> >> > conversion
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> from
> >> > >>> >> > >>>> org.apache.flink.api.java.tuple.Tuple2 to
> >> > >>> >> > >>>> >> >>> Scala
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> tuple and
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> from
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> java.lang.Long to
> >> scala.Long
> >> > >> and I
> >> > >>> >> > guess
> >> > >>> >> > >>>> this
> >> > >>> >> > >>>> >> is
> >> > >>> >> > >>>> >> >>> an
> >> > >>> >> > >>>> >> >>> >> >>>>> >> unnecessary
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > complexity
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> for an example (?).
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Another way is, of
> >> course, to
> >> > >> copy
> >> > >>> >> the
> >> > >>> >> > >>>> example
> >> > >>> >> > >>>> >> >>> data
> >> > >>> >> > >>>> >> >>> >> in
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> Scala
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > example.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Am I missing something
> >> here?
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Thanks!
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> Cheers,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> V.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >> On 5 September 2014
> 15:52,
> >> > >> Aljoscha
> >> > >>> >> > >>>> Krettek <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> aljoscha@apache.org
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> Alright, I updated my
> >> repo:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> >
> >> https://github.com/aljoscha/incubator-flink/commits/scala-rework
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> This now has a working
> >> > >> WordCount
> >> > >>> >> > example.
> >> > >>> >> > >>>> >> It's
> >> > >>> >> > >>>> >> >>> >> pretty
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> much a
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> copy
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> of
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> the Java example with
> >> some
> >> > >> fixups
> >> > >>> >> > for the
> >> > >>> >> > >>>> >> syntax
> >> > >>> >> > >>>> >> >>> and
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> lambda
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > functions.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> You'll also notice
> that I
> >> > >> added the
> >> > >>> >> > >>>> >> java-examples
> >> > >>> >> > >>>> >> >>> >> as a
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> dependency
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> for
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> the scala-examples. I
> did
> >> > this
> >> > >> to
> >> > >>> >> > reuse
> >> > >>> >> > >>>> the
> >> > >>> >> > >>>> >> >>> example
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> input
> >> > >>> >> > >>>> >> >>> >> >>>>> >> data.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> When you ported a
> program
> >> > you
> >> > >> can
> >> > >>> >> do
> >> > >>> >> > a
> >> > >>> >> > >>>> pull
> >> > >>> >> > >>>> >> >>> request
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> against
> >> > >>> >> > >>>> >> >>> >> >>>>> >> my
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> repo
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> and I will collect the
> >> > >> examples.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> Happy coding. :D
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> On Fri, Sep 5, 2014 at
> >> 12:19
> >> > >> PM,
> >> > >>> >> > Hermann
> >> > >>> >> > >>>> >> Gábor <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> reckoner42@gmail.com
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > +1
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > ComputeEdgeDegrees
> for
> >> me!
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > On Fri, Sep 5, 2014
> at
> >> > 11:44
> >> > >> AM,
> >> > >>> >> > Márton
> >> > >>> >> > >>>> >> >>> Balassi <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> balassi.marton@gmail.com
> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> > wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> +1
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> BatchGradientDescent
> >> for
> >> > me
> >> > >> :)
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> On Fri, Sep 5, 2014
> at
> >> > >> 11:15 AM,
> >> > >>> >> > Kostas
> >> > >>> >> > >>>> >> >>> Tzoumas <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > ktzoumas@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > +1
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > I go for
> >> > WebLogAnalysis.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > My experience with
> >> > Scala
> >> > >>> >> > consists of
> >> > >>> >> > >>>> >> going
> >> > >>> >> > >>>> >> >>> >> through
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > a
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> tutorial
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> so
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > this
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> will
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > be a good stress
> >> test
> >> > >> both for
> >> > >>> >> > me and
> >> > >>> >> > >>>> >> the
> >> > >>> >> > >>>> >> >>> new
> >> > >>> >> > >>>> >> >>> >> API
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > :-)
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > On Thu, Sep 4,
> 2014
> >> at
> >> > >> 9:09
> >> > >>> >> PM,
> >> > >>> >> > >>>> Vasiliki
> >> > >>> >> > >>>> >> >>> >> Kalavri <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > vasilikikalavri@gmail.com>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > +1 for having
> >> other
> >> > >> people
> >> > >>> >> > >>>> implement
> >> > >>> >> > >>>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > examples!
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > Connected
> >> Components
> >> > and
> >> > >>> >> > Kmeans for
> >> > >>> >> > >>>> >> me :)
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > -V.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > On 4 September
> >> 2014
> >> > >> 21:03,
> >> > >>> >> > Fabian
> >> > >>> >> > >>>> >> Hueske <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> fhueske@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > I go for
> >> > >>> >> > TriangleEnumeration and
> >> > >>> >> > >>>> >> >>> PageRank.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > Let's also do
> >> the
> >> > >> examples
> >> > >>> >> > >>>> similar
> >> > >>> >> > >>>> >> to
> >> > >>> >> > >>>> >> >>> the
> >> > >>> >> > >>>> >> >>> >> Java
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> examples:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > - running
> >> > >> out-of-the-box
> >> > >>> >> > without
> >> > >>> >> > >>>> >> >>> parameters
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > - parameters
> for
> >> > >> external
> >> > >>> >> > data
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > - follow a
> >> similar
> >> > >> code
> >> > >>> >> > structure
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > 2014-09-04
> 20:56
> >> > >> GMT+02:00
> >> > >>> >> > >>>> Aljoscha
> >> > >>> >> > >>>> >> >>> >> Krettek <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > aljoscha@apache.org
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > Will do,
> then
> >> > >> people can
> >> > >>> >> > >>>> reserve
> >> > >>> >> > >>>> >> their
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > favourite
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> examples
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > here.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > On Thu, Sep
> 4,
> >> > 2014
> >> > >> at
> >> > >>> >> > 8:55 PM,
> >> > >>> >> > >>>> >> Fabian
> >> > >>> >> > >>>> >> >>> >> Hueske
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> fhueske@apache.org>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > wrote:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > Hi,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > I think
> >> having
> >> > >>> >> examples
> >> > >>> >> > >>>> >> implemented
> >> > >>> >> > >>>> >> >>> by
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > different
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> people
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> proved to
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > be
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > valuable
> in
> >> the
> >> > >> past.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > I'd help
> >> with
> >> > two
> >> > >> or
> >> > >>> >> > three
> >> > >>> >> > >>>> >> examples.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > It might
> be
> >> > >> helpful if
> >> > >>> >> > you'd
> >> > >>> >> > >>>> >> port a
> >> > >>> >> > >>>> >> >>> >> simple
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > first
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> one
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > such
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > as
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > WordCount.
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > Fabian
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > 2014-09-04
> >> > 18:47
> >> > >>> >> > GMT+02:00
> >> > >>> >> > >>>> >> Aljoscha
> >> > >>> >> > >>>> >> >>> >> Krettek
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > > <
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> aljoscha@apache.org
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Hi,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> I have a
> >> > working
> >> > >>> >> > rewrite of
> >> > >>> >> > >>>> the
> >> > >>> >> > >>>> >> >>> Scala
> >> > >>> >> > >>>> >> >>> >> API
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> here:
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >>
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> >
> >> https://github.com/aljoscha/incubator-flink/commits/scala-rework
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> I'm
> hoping
> >> > that
> >> > >> I'll
> >> > >>> >> > only
> >> > >>> >> > >>>> have
> >> > >>> >> > >>>> >> to
> >> > >>> >> > >>>> >> >>> >> write
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> tests
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> and
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > port
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> examples.
> >> Do
> >> > you
> >> > >>> >> think
> >> > >>> >> > it
> >> > >>> >> > >>>> makes
> >> > >>> >> > >>>> >> >>> sense
> >> > >>> >> > >>>> >> >>> >> to
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> let
> >> > >>> >> > >>>> >> >>> >> >>>>> >> other
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > people
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> port
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> the
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> examples,
> >> so
> >> > that
> >> > >>> >> > someone
> >> > >>> >> > >>>> else
> >> > >>> >> > >>>> >> uses
> >> > >>> >> > >>>> >> >>> >> it and
> >> > >>> >> > >>>> >> >>> >> >>>>> >> maybe
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > notices
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > some
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > quirks
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> in the
> API?
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Cheers,
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >> Aljoscha
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > > >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > > >>>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> > >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >> >
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >> >>
> >> > >>> >> > >>>> >> >>> >> >>>>> >>
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>>
> >> > >>> >> > >>>> >> >>> >> >>>
> >> > >>> >> > >>>> >> >>> >>
> >> > >>> >> > >>>> >> >>>
> >> > >>> >> > >>>> >>
> >> > >>> >> > >>>>
> >> > >>> >> >
> >> > >>> >>
> >> >
> >>
> >
> >
>

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