Replace Empty List with String

Hi Everyone,

This is my first post so hopefully i’m not going to go against any etiquette.

I’ve been searching online for an answer to this query for a few days now and I can’t find the answer i’m looking for. I have a parent list which contains some empty lists, the list can be varying lengths for different designs and the empty lists can occur at any point or not be present at all dependent on the design layout. All I want to do is replace the empty lists with a simple “-” string, I’ve tried many ways but can’t seem to achieves this.

The below shows the different ways i’v tried so far, I’ve also tried lots of combinations of lacing as advised online with no joy. I think I may have to delve into a Loop.While to insert the items in separate steps in the List.Insert node or the List.ReplaceItemAtIndex node, as they are creating separate sub-lists which is not what I want.

Any suggestions would be much appreciated;

Thanks