Let’s say you have a number of identical class elements:

<div class="myClass">One Title</div>
<div class="myClass">Another Title</div>
<div class="myClass">Brrrr</div>
<div class="myClass">Zzzzzz</div>

And you want to get a particular element from this list.

var myArray = $(".myClass");
var thirdElement = myArray[2];
console.log(thirdElement);
// <div class="myClass">Brrrr</div>

But note, that myArray[2] is the HTML element, not an jQuery object. If you want to access it via jQuery, you’ll have to “arm” it…

var myArray = $(".myClass");
var thirdElement = $(myArray[2]);
console.log(thirdElement);
// [<div class="myClass">Brrrr</div>]

Interrating over a jQuery selected list can be done with the each() function:

myArray.each(function(i, element){
	var myElement = myArray[i];
	// this
	// element
}

myElement, element and this would all hold the same value at each iteration. i is obviously the index counter.

It’s also described quite clearly at the jQuery Docs, but I think it’s important enough to reiterate.