jQuery select an element by multiple css classes

jQuery Class selector works well if you have a single class assigned to an element. What if I assign two classes to an element(Ex: <div class="one two">), how can I find that element if I k开发者_运维问答now these two classes?

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$("div.one.two")

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$('.one.two');

more on multiple selectors if you just did a search on SO first.