In the good old days, if you wanted to create re-usable code, you would create a library of related functions or objects. Now, the excitement is all around frameworks. Everyone has one. What is the difference between the two?
He compares a library and a framework, pointing out key differences like how they fit with the application (controlled by or controlling) and dependencies they require. He rounds out his boot sequence, adding a few new parts to the structure of his example application.