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https://issues.apache.org/jira/browse/TINKERPOP3-780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710293#comment-14710293
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Daniel Kuppitz commented on TINKERPOP3-780:
-------------------------------------------
Note that the query works as expected if you wrap {{anystep.fold()}} in a
{{map()}}.
{noformat}
gremlin> g = TinkerFactory.createModern().traversal()
==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
gremlin> g.V(1).repeat(map(out().fold())).times(1)
==>[v[3], v[2], v[4]]
gremlin> g.V(1).repeat(map(out().fold()).unfold()).times(1)
==>v[3]
==>v[2]
==>v[4]
gremlin> g.V(1).repeat(map(out().fold()).unfold()).times(2)
==>v[5]
==>v[3]
gremlin>
{noformat}
> Use of fold() in repeat()
> -------------------------
>
> Key: TINKERPOP3-780
> URL: https://issues.apache.org/jira/browse/TINKERPOP3-780
> Project: TinkerPop 3
> Issue Type: Bug
> Components: process
> Affects Versions: 3.0.0-incubating
> Reporter: stephen mallette
> Assignee: Marko A. Rodriguez
> Fix For: 3.0.1-incubating, 3.1.0-incubating
>
>
> I would expect these two traversals to be equivalent:
> {code}
> gremlin> g = TinkerFactory.createModern().traversal()
> ==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard]
> gremlin> g.V(1).repeat(out().fold().unfold()).times(2)
> gremlin> g.V(1).repeat(out()).times(2)
> ==>v[5]
> ==>v[3]
> {code}
> Also note something [~dkuppitz] pointed out:
> {code}
> gremlin> g.V(1).repeat(out().fold()).times(1)
> ==>[]
> gremlin> g.V(1).out().fold()
> ==>[v[3], v[2], v[4]]
> {code}
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