Compact JavaScript for loop

This this if the iteration order doesn't matter. Try this:

for (var i = anArray.length; i--; ) {
   doSomething(anArray[i]);
}

It's smaller (by 1 character) and, in my opinion, more readable than:

var i = anArray.length;
while(i--) {
   doSomething(anArray[i]);
}

Enjoy!