ABSTRACT
From the beginning we have said that Scala is a completely object-oriented language. You have been using objects and calling methods on them since back in chapter 3 when we were taking our first steps in the language. Despite this, we have actually done very little with object-orientation. This has been intentional. So far we have been building up your logic skills and teaching you to break problems up into different functional units. Now that your problem-solving skills have reached a sufficient level, we will take the next step to have you doing full object-oriented decomposition of problems. Beginning with this chapter we will also start really revealing many of the details behind things that we have been using all along.
