In the last chapter, the focus was on the specifications and installation of the 'tools', if I continue using the analogy of 'tools.' By the same analogy—until the user understands which control provides what functionality—the tool cannot be used to its maximum potential. So it is necessary to understand which library provides what functionality and which component maps to what specification for each and every tool. Ruby and RoR is no exception to this.

RoR builds upon the functionalities provided by Ruby. Thus, by understanding how Ruby works, you can know about the building blocks of RoR. That in turn, will help you to have a clearer picture of how the different components of RoR fit into the bigger picture. The chapter will first introduce you to the basic concepts of Ruby. Then it will move on to the basic concepts and components of RoR. Finally, the chapter will be completed with an example of RoR, which can be considered as 'Hello World' in RoR...