How to display unique elements of an array using Swift? [duplicate]
If you don't care about order:
Simply use a set:
let set: Set = ["a", "s", "d", "s", "f", "g" , "g", "h", "e"]print(set) // ["a", "s", "f", "g", "e", "d", "h"]If you care about the order:
Use this extension, which allows you to remove duplicate elements of any Sequence, while preserving order:
extension Sequence where Iterator.Element: Hashable { func unique() -> [Iterator.Element] { var alreadyAdded = Set<Iterator.Element>() return self.filter { alreadyAdded.insert($0).inserted } }}let array = ["a", "s", "d", "s", "f", "g" , "g", "h", "e"]let result = array.unique()print(result) // ["a", "s", "d", "f", "g", "h", "e"]