how to make @@ instead of @? in fact, what’s the difference? is it because Dynamo version? i’m currently using 2.0

It is ‘‘keep list structure’’

thanks Jonathan, happy holiday season!
well, that’s what i thought/remembered, but for unknown reason, the node won’t change to @@ after i selected “keep list structure”, maybe it’s only me?

OK, fixed after i close and reopen Dynamo

This is a bug with 2.0 -> 2.0.2 - it is fixed in 2.1 (currently our master branch)

thanks Michael, i’ll install 2.1 even though it’s not (?) official release