How to select elements only with a certain set of classes?

Question

JavaScript

Maybe a stupid question, but I can't figure it out.
There are 3 boxes with class .one and one box with class .one and .two

How do I select only element in jQuery that has both .one and .two classes?

Answer 1

Um... $('.one.two') won't work?

Answer 2

$(".one").find(".two")