[tjbrennan]

Even better, +"5" will coerce the string to an integer. I'm ashamed to admit that I've abused it.

[grrowl]

To quickly cooerse to a boolean:

    !!0 === false; !!"zipzap" === true; !!NaN === false

To cooerse to a integer (not float):

    ~~0.5 === 0; ~~"12zipzap" === 0; ~~(Math.PI) === 3;

I tend to avoid it for readability (for other developers)