Facebook Tones Down Open Graph

You probably know exactly what Facebook’s Open Graph is even if you think otherwise. Every time you see that one of your friends read a Yahoo! article or listened to a song on Spotify, you can thank Open Graph. It’s…
By your Command

Command design pattern is one of the widely known design pattern and it falls under the Behavioral Design Pattern (part of Gang of Four). As the name suggests it is related to actions and events in an application. Problem statement:…