The result iterator has as many elements as the baseIterator and have the same termination -- the same completion value or failure reason. But the non-final values are the corresponding non-final values from baseIterator as transformed by func.
baseIterator
func
The result iterator has as many elements as the
baseIteratorand have the same termination -- the same completion value or failure reason. But the non-final values are the corresponding non-final values frombaseIteratoras transformed byfunc.