Try Modeling Behavior, Rather Than Data

Wasn’t that the original idea behind object-oriented programming, anyway?

Photo by Kdwk Leung on Unsplash

When writing object-oriented (OO) code, we often find ourselves modeling data. That is to say, we create data classes: classes that contain some number of fields, each of which represents a piece of data. Importantly, these data classes contain little to no business logic…