multiple gremlin commands combined as one

Question

im using nodejs, neo4j with node-neo4j and trying to put multiple gremlin command together
and im stuck with this problem
if i execute the commands one after another like

x = [] as Set
y  = [] as Set
g.v(id1).both('friend').aggregate(x)
g.v(id2).both('friend').aggregate(y)
x.retainAll(y);
x

it works fine and a list of nodes is returned
on the other hand if i write it like

x = [] as Set;y  = [] as Set;g.v(id1).both('friend').aggregate(x);g.v(id2).both(
'friend').aggregate(y);x.retainAll(y);x

nothing is returned
read an answer here which says that

if your last command is not an iterator then you will have to manually iterate of the sequence

but dont know how to apply this in my case.

Answer 1

oops!
i was missing a very simple thing .iterate()
this command now works

x = [] as Set;y  = [] as Set;g.v(id1).both('friend').aggregate(x).iterate();g.v(id2).both('friend').aggregate(y).iterate();x.retainAll(y);x