next()
Advances to the next element and returns it, or nil if no next element exists.
Declaration
mutating func next() -> JoinedSequence<Base>.Iterator.Element?Discussion
Once nil has been returned, all subsequent calls return nil.
Advances to the next element and returns it, or nil if no next element exists.
mutating func next() -> JoinedSequence<Base>.Iterator.Element?Once nil has been returned, all subsequent calls return nil.