"Handy Javascript Scoping Trick"

Neat Javascript function scoping trick from Dustin Diaz, master of cool Javascript tricks. His Javascript Video Tutorials were the first time I was exposed to proper Javascript (Justin, do some more!).

Here's the trick:

var o = 'hello world';

(function() {
  alert(this);
}).call(o);

And why is this neat? Because it lets you avoid the "that = this" funkiness (if you've had to do it you know what I'm talking about). Read Justin's post for actual info.