jQuery multiple class selector

I want to select all the elements that have these two classes 'a' and 'b'. So, only the elements that have both classes. When I use $(".a, .b") it gives me union, but I want intersection.

how to create an "array of selectors' in objective-c

i'm using the iphone sdk (3.0) and i'm trying to create an array of selectors to invoke a variety of methods within one class.

jQuery :contains selector to search for multiple strings

Assuming i have:

<li id="1">Mary</li>

<li id="2">John, Mary, Dave</li>

<li id="3">John, Dave, Mary</li>

<li id="4">John</li>

jQuery: How to select "from here until the next H2”?

I'm setting up a very straightforward FAQ page with jQuery. Like so: