Well, I have two lists:
- the first refers to all generic models
- the second to only those that have been modified by the routine (nested items).
What I need to do is to identify in the first list what is not contained in the second list (should be a list of 20 items). Then I want to group these elements (or at least show in some way that they have not been modified).
Does anyone have any suggestions? Thank you very much
Already saw this: Delete elements from one list of elements, that are NOT in another list of elements
Compare list of lists
But It didn’t help much