I have a simple question but the solution maybe will not to be too easy.
What we have to do if we have two lists of elements (surfaces/points…) with different index and we have to select, for example surfaces from first list other than the surfaces in the first list…
…The second list was created from the first but with some modifications, (for example: by used "random reduce, attractor…), so the index of items of the second list is different to index of items of the first list, but we want to select some elements from the first list but not these elements which we receive with the second list.
Maybe I described it not very clearly, I add picture.
Any help would be much appreciated,
(Sorry for my English).
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