List with same argument

Hi, it’s always me and my list issues :slight_smile:
I have a question, I’ve two lists with the same arguments, that are point, one is flatten, the other is not. I would like to create a third list, which has the same structure of the first one (so divided in sublist), but, instead of having as argument the points, it has as argument the index of the correspondent point in the flattened list. Is that possible? (I hope I explained myself :smiley: )

IndexOf should do the trick:


awesome, thanks