Get element in position N if exists

Question

I am using the following to get a list of DIVS;

var $items = $this.children("div.poster");

How can I get the element in position 4 from $items if it exists?

Answer 1

Use the .eq() method:

var $item4 = $items.eq(3);

To get the position of an item, use .index()

var position = $item4.index($items);