Stack Overflow is an amazing resource. It's a place to ask questions and get them answered, but it's a lot more than that. Like any other online community, people get to know each other and some of them start to relax and have fun. In that spirit came the question "What is, in your opinion, the most surprising, weird, strange or really "WTF" language feature you have encountered?" with over two hundred answers. The current highest-voted answer is how C++ is fine with:

10[a]

(for some array a) and it just means the same as

a[10]

I also like the Javascript answer, in which a commenter points out that "111" - -"222" gives 333 and "111" + "222" gives "111222". And another answer I blogged about eighteen months ago. You could spend far too long reading all these and laughing.

Kate