Here's my quick port to Swift. It can run in a playground. https://gist.github.com/donarb/1502a12cb16fa74f4fd2e295867da253 https://gist.github.com/donarb/1502a

Here's my quick port to Swift. It can run in a playground. https://gist.github.com/donarb/1502a12cb16fa74f4fd2e295867da253 https://gist.github.com/donarb/1502a12cb16fa74f4fd2e295867da...