apoc.coll.duplicates Function apoc.coll.duplicates(coll LIST<ANY>) - returns a LIST<ANY> of duplicate items in the collection. Signature apoc.coll.duplicates(coll :: LIST<ANY>) :: LIST<ANY> Input parameters Name Type Default coll LIST<ANY> null Usage examples The following returns a list of duplicates in a list: RETURN apoc.coll.duplicates([1,3,5,7,9,9]) AS output; Table 1. Results Output [9] apoc.coll.dropDuplicateNeighbors apoc.coll.duplicatesWithCount