List length of data tree list

[Joseph_Oster]

Creating duplicate threads will not help you or anyone else with a similar issue.

Data tree structuring organising

Hello there, can someone help me with structuring these data tree. I need to have two lists out of this data tree, One of them will contain the elements that have { x ; 0 } elements, and the other the {x, 1} elements , if there is something in the list, I need to get the value 1 (or the length of the list) , if there is nothing on the list I need to get 0 thanks in advance, DdataTree_Structure.gh (13.7 KB)

You’ll have better luck if you can clarify your objective. I see no evidence of “three lists” in either of the GH files you have posted.