Don't be hatin'. It's a useful read for many.

"Simple concept" is subjective. I'd bet that discussing "simple concepts" with an engineer or scientist would likely cause your mind to grasp and instinctively try to relate to your own memorization of facts. But that shouldn't preclude you from discussing what you do know, or for that matter, sharing it with the world.

(answering you, but also for otherz saying the same thing below)

Yeah you're probably right, I've been a bit pedantic.

I feel this article is unnecessary long for the subject, it would be a good length for something like "setting up a hadoop cluster", but having all sorts of articles about all subjects is a very good thing. My bad.

SEO.

Callbacks exist in C. But inline functions (where a parameter to another function would be placed), don't. Actually, we don't even have closures in standard C (there is a non-standard extension provided by Apple that maybe you can use to recreate JavaScript's callback hell if you're so inclined...)

I would've loved an article this well written and explicit when I was first learning JS (or even any language, really). Really well done with good, practical examples.

Detailed posts like these help beginners.