Data Modeling 2
In this lesson we stop and put all that we’ve learned this week into action. We’ll complete another object modeling exercise together. But this time, we’ll make use of inheritance, polymorphism, and other new ideas that we recently learned. Welcome back!
Warm Up Debugging ChallengeWarm Up Debugging Challenge
But, as we frequently do, let’s warm up with another graded debugging challenge!
Modeling Office HoursModeling Office Hours
Last time we did a game, and I said: I’m sorry we’re doing a game. This time we’re going to do something that may seem a bit like navel-gazing. And I’ll say: I’m sorry we’re doing something course-related. This is what I think about!
So let’s model office hours.
Classes and RelationshipClasses and Relationship
One way to begin object modeling is to think about what kind of entities we need to model and what kind of relationships they should have with each other. Let’s start there:
Class Properties and MethodsClass Properties and Methods
Next, let’s consider the kind of actions and methods that our objects need to support. That will help guide us as we add required instance variables.
Implementing Initial MethodsImplementing Initial Methods
Next, we’ll pick a pair of the methods on our Room class to implement.
Finishing UpFinishing Up
Finally, we’ll finish at least a preliminary implementation of our office hours model. And then discuss how you could extend and improve it!
More Practice
Need more practice? Head over to the practice page.