Set up Angular Application

Service and Factory are both the function the provide inject-able object into Angular Module, the difference is subtle

Basicly the difference is

1. for service, it return the instance of the function, the function it define is actually an object constructor
2. for factory, it return the result of the function, it return the object

reference:

http://slides.wesalvaro.com/20121113/#/

http://stackoverflow.com/questions/13762228/confused-about-service-vs-factory