[
https://issues.apache.org/jira/browse/TINKERPOP-974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16051048#comment-16051048
]
stephen mallette commented on TINKERPOP-974:
--------------------------------------------
As of 3.2.5 we've published methods for doing this kind of thing:
{code}
g.V('u2590').possibleFriends()
{code}
with DSLs. Gremlin code can be more modularized this way.
> Saving headless traversals for reuse (clone Iterator Fun)
> ---------------------------------------------------------
>
> Key: TINKERPOP-974
> URL: https://issues.apache.org/jira/browse/TINKERPOP-974
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.0.2-incubating
> Reporter: Sebastian Estevez
> Fix For: 3.2.6
>
>
> 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').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.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
