JavaScript. At once bizarre and yet beautiful, it is surely the programming language that Pablo Picasso would have invented. Null is apparently an object, an empty array is apparently equal to false, and functions are bandied around as though they were tennis balls.
This article is aimed at intermediate developers who are curious about more advanced JavaScript. It is a collection of JavaScript’s oddities and well-kept secrets. Some sections will hopefully give you insight into how these curiosities can be useful to your code, while other sections are pure WTF material. So, let’s get started
via Smashing Magazine – Ten Oddities And Secrets About JavaScript. JavaScript is easily one of the weirdest languages to have gained such usefulness.