Have you ever been to Amazon or eBay? While searching for an item, you will have noticed on the left a set of filters that tell you how many items of each type are available. For instance, if we're looking for TVs, they'll have a section where a list of brands and number of items in each brand would be listed. One section would be for the screen size with each screen size and number of available items in that. Similarly, one would be for TV features, whether it is a SmartTV, has 3D features and so on.

So you get the idea, categorized, summarized information on your left that lets you filter your results should you choose to go for a Sony Smart TV in 60 inches with 3D capabilities. You make appropriate choices by ticking the check boxes and the listed items will be filtered by your selection.

Certainly, you'll want such capabilities in your own application. How does that work and how can we implement it? This is pretty simple actually, but there are few steps: