Ah, memories of the tool whose CV stated "Javascript: Advanced" and "jQuery: Intermediate" but who asked me to explain what the $ was in some code... It took far too long for us to convince management to get shot of that one.
In many js libraries $ is an alias for document.getElementById, whereas in jQuery it's an alias for jQuery. It might have been a reasonable question to ask.
He didn't even recognise $ as a valid function name which rules out exposure to other libraries mapping it to different behaviours, and the use of an anonymous function (remember: this is someone who claimed to be "advanced" in Javascript) really blew his mind.
