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https://issues.apache.org/jira/browse/TINKERPOP3-974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stephen mallette updated TINKERPOP3-974:
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Affects Version/s: 3.0.2-incubating
Component/s: process
Issue Type: Improvement (was: New Feature)
[~mhfrantz] you have thought a bit about Gremlin modularization. do you have
relevant JIRA items open on this topic already that you could reference here?
> Saving headless traversals (clone Iterator Fun)
> -----------------------------------------------
>
> Key: TINKERPOP3-974
> URL: https://issues.apache.org/jira/browse/TINKERPOP3-974
> Project: TinkerPop 3
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.0.2-incubating
> Reporter: Sebastian Estevez
>
> It would be very useful to be able to do something like this:
> {code}
> gremlin> possibleFriends =
> out('rated').inE('rated').has('stars',5).outV().groupCount().order(local).by(valueDecr).limit(local,1).mapKeys()
> gremlin> g.V('u2590').map(possibleFriends)
> {code}
> Marko suggested the following workaround method using `; null` and `.clone()`
> {code}
> gremlin> possibleFriends =
> out('rated').inE('rated').has('stars',5).outV().groupCount().order(local).by(valueDecr).limit(local,1).mapKeys();
> null
> ==>null
> gremlin> g.V('u2590').map(possibleFriends.clone())
> ==>v[u4277]
> gremlin> g.V('u2590').map(possibleFriends.clone())
> ==>v[u4277]
> gremlin> g.V('u2590').map(possibleFriends.clone())
> ==>v[u4277]
> gremlin> possibleFriends.clone()
> gremlin> possibleFriends.clone()
> gremlin> possibleFriends.clone()
> gremlin> possibleFriends.clone()
> gremlin> possibleFriends.clone()
> gremlin> possibleFriends.clone()
> gremlin> possibleFriends
> gremlin> g.V('u2590').map(possibleFriends.clone())
> The traversal strategies are complete and the traversal can no longer be
> modulated
> Display stack trace? [yN]
> {code}
> https://gist.github.com/okram/9feb6940c749ed9a3058
> Having a nice way of breaking down complex gremlin into functions and using
> them later would help modularize gremlin queries and improve readability and
> maintenance.
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