Short story: it was linked from a FAQ at Programmers. It got deleted at SO. I pointed it out to the poster at Programmers. He's now asked for it to be resurrected somehow. It's off-topic both at SO and Programmers.
But, it's definitely on-topic here! I had a very quick search and couldn't see a dupe here, but we may well have one.
Do we want to agree to fold the information in the post into a Q&A here, either as a new one or as a modification to an existing one? I've posted this as a suggestion on the meta SO thread and linked here.