In this chapter, you learned how to use all the features included in Python, C#, and JavaScript in order to organize complex object-oriented code. We took advantage of modules in Python, namespaces in C#, and nested objects in JavaScript. We organized multiple classes, interfaces, and constructor functions of a house floor plan layout application. If the basic features included in JavaScript to organize code aren't enough, we can use specialized libraries (such as the popular RequireJS).

Now that you have learned how to organize object-oriented code, we are ready to understand how to move forward to take advantage of all the things you learned so far in this book and use them in our real-world applications in Python, JavaScript, and C#, which is the topic of the next chapter.