Destructuring tuples

There is a simple method to access tuple values. Take, for example, the size pair, as follows:

let size = (width: 200, height: 400)
let (w, h) = size
let (width, _) = size

In the preceding example, we initialize a tuple on the first line. On the second line, we destructure both parameters as w and h. On the last line is what we call a partial destructuring: when you're only interested in one part of the tuple, you can extract only a part of it. This is useful when dealing with large tuples.