Here it is
(?:(?<=,)|(?<=\A)) ?([^,]*),(?=.*?(?<=,) ?\1(?=,|\z))
Good you solved that. Any other changes concerning regex engine that don't appear in a changelog?
Remove_duplicates_from_comma__or_comma_space__delimited_list.mta (226 Bytes)
Here it is
(?:(?<=,)|(?<=\A)) ?([^,]*),(?=.*?(?<=,) ?\1(?=,|\z))
Good you solved that. Any other changes concerning regex engine that don't appear in a changelog?
Remove_duplicates_from_comma__or_comma_space__delimited_list.mta (226 Bytes)