Combining lists at a certain level

Lists-Logic
1

Hello everyone,

I have four different rectangles as polycurves. Extracting their curves, start and endpoints consequently, I have the following code:

Pasted image709×801 64.3 KB

I would like to combine the start and endpoints without flattening such that the list @Level1 have 8 elements, namely all startpoints and endpoints of every rectangle beside each other without loosing the level structure.

On of ways I thought of is a list combination by list.join which returns null’s, which I actually cannot understand why. I hope I do it exactly as described here.

Does anybody know how it could be possible?

I would be grateful of your help.

2

Is this what you need?

List-combine.JPG732×598 28.5 KB

1 Like
3

…thank you for your reply. actually this is my case:

Pasted image805×533 29.2 KB

which doesn’t work also with code blocks because of the 4th level.
What I want to do is to have a four level list like this as outcome of the two lists above

Pasted image785×437 17.2 KB

…

4

Then you could use a SetUnion node instead of List.Combine / List.Join

Does it solve your issue?

3 Likes
5

Hi Yna_Db

thank you for your reply. Your solution works. Thank you.