The submission history of posts from nullprogram.com is… let's say… "odd"… several instances of double or triple posts, including doubles from the same submitter… @dang is this something you care about?
As an avid reader of it myself, nullprogram.com really can very one of these sites whose articles can very plausibly get recurringly posted by its readers (it's one of those sites that, when you're getting into C, you keep ending up at) rather than its author github.com/skeeto who I really would think is probably not hunting for HN points. Just a hunch tho, never know =)
It's just mildly weird that the same reader posts it twice with a distance of 12 hours, I hope this "null program" doesn't cause amnesia by nulling out memory ;D