This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
I've come across some jQuery code that checks the length of the wrapped set before performing certain "getting rid of" methods, such as hide() or remove(). Presumably, the coder's intent is only to call hide() or remove() if there's actually something matched to hide or remove.
Elsewhere in the same code (presumably written by the same person, or team), there's no length check before other operations: