It is not working. Xcode says "the app has been killed by the operating system because it is using too much memory"
I tried to debug the code the same as your code(count 1,000,000)
I think it is not available anymore. (The article is written 7 years ago)
on29-dev
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution