Override/remove side effect keys

[Sam Rosen]

How can I use the SAME side effect key and override the previous one? Is there a way to clear side effects keys?

Starter code:

graph = TinkerFactory.createModern();
g = graph.traversal()


gremlin> g.V().limit(3).aggregate("list").select("list")
==>[v[1],v[2],v[3]]
==>[v[1],v[2],v[3]]
==>[v[1],v[2],v[3]]


g.V().limit(3).aggregate("list").V().dedup().tail(3).aggregate("list").select("list")

==>[v[1],v[2],v[3],v[4],v[5],v[6]]
==>[v[1],v[2],v[3],v[4],v[5],v[6]]
==>[v[1],v[2],v[3],v[4],v[5],v[6]]


// DESIRED OUTPUT: [v[4],v[5],v[6]] ...

// Or a way to clear side effect keys?
gremlin> g.V().limit(3).aggregate("list").clear("list").select("list")
==>

Thanks,

Sam

[Daniel Kuppitz]

You can only clear side effects using a lambda:

gremlin> g.V().limit(3).aggregate("list").sideEffect {it.getSideEffects().get("list").clear()}.V().dedup().tail(3).aggregate("list").select("list")

==>[v[4],v[5],v[6]]

==>[v[4],v[5],v[6]]

==>[v[4],v[5],v[6]]

However, most times that's not even necessary and you can write your query in a way that you don't need to use or reuse side effects. Can you talk more about your use case?

Cheers,

Daniel

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