This:

gremlin> t = g.V(1).outE().group().by(label).by(inV());null
==>null
gremlin> t.next()
==>created=v[3]
==>knows=v[2]

versus the "correct" answer of:

gremlin> g.V(1).outE().group().by(label).by(inV().fold()).next()
==>created=[v[3]]
==>knows=[v[2], v[4]]




On Thu, Feb 25, 2016 at 1:58 PM, Marko Rodriguez <okramma...@gmail.com>
wrote:

> Hi,
>
> I don't understand the question. Can you provide a simple example?
>
> Thanks,
> Marko.
>
> http://markorodriguez.com
>
> On Feb 25, 2016, at 11:54 AM, Jonathan Ellithorpe <j...@cs.stanford.edu>
> wrote:
>
> > Yup
> >
> > On Thu, Feb 25, 2016 at 10:27 AM Stephen Mallette <spmalle...@gmail.com>
> > wrote:
> >
> >> so your question is: why doesn't the Traversal in the by() iterate
> >> everything in it rather than requiring the call to fold()?
> >>
> >> marko, perhaps you're best suited to answer that....
> >>
> >> On Thu, Feb 25, 2016 at 1:17 PM, Jonathan Ellithorpe <
> j...@cs.stanford.edu>
> >> wrote:
> >>
> >>> Very helpful, thank you. The bits about how the console automatically
> >>> iterates over the return value was very helpful.
> >>>
> >>> One part that was still a little unclear to me was why only next() is
> >>> called on the inV() Traversal for the second by().
> >>>
> >>> "[the console] only iterates the result of a line of execution.
> >> Therefore,
> >>> inner Traversal instances do not get that benefit, and as such, inV()
> >> only
> >>> has next() called upon it pulling a single vertex from the "knows"
> edges"
> >>>
> >>> That only the returned traversal gets iterated makes sense, but why
> that
> >>> iteration doesn't, in its course, trigger a complete iteration of inV()
> >> is
> >>> unclear to me.
> >>>
> >>> I just started using the gremlin console yesterday so this is all new
> to
> >> me
> >>> :)
> >>>
> >>> Jonathan
> >>>
> >>> On Wed, Feb 24, 2016 at 12:27 PM Kelvin Lawrence <
> >>> kelvin.r.lawre...@gmail.com> wrote:
> >>>
> >>>> Thanks for putting this together. I recall we had some good exchanges
> >>> last
> >>>> year about the good ole console!
> >>>>
> >>>>
> >>>> Kelvin
> >>>>
> >>>>
> >>>> On Tuesday, February 16, 2016 at 8:13:14 AM UTC-6, Stephen Mallette
> >>> wrote:
> >>>>>
> >>>>> We answer a lot of questions on the user mailing list about the
> >> Gremlin
> >>>>> Console and there are many themes of usage that seem to come up time
> >> and
> >>>>> time again.  I figured that these themes would make a good addition
> >> as a
> >>>>> tutorial.
> >>>>>
> >>>>>
> >>>>>
> >>>
> >>
> http://tinkerpop.apache.org/docs/3.1.1-incubating/tutorials/the-gremlin-console/
> >>>>>
> >>>>> I hope you all enjoy this more in-depth look at such an important
> tool
> >>> of
> >>>>> the TinkerPop stack.
> >>>>>
> >>>>> Stephen
> >>>>>
> >>>>
> >>>
> >>
>
>

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