Type Aliases

In many of the earlier examples, we rewrote a certain tuple type like (Int, Int, String) multiple times. This, of course, is not necessary, as we could define a typealias for it:

typealias Example = (Int, Int, String)

func add(elm: Example) { }

However, if you're using a certain tuple construction so often that you think about adding a typealias for it, you might really be better off defining a struct.