Software Design - The Observer Pattern and Series Wrap-Up

Develpreneur: Become a Better Developer and Entrepreneur · Feb 1, 2019 · 20m

We wrap up the season with the observer pattern and a review of what we have learned. This pattern is one that you probably have already encountered. Instead of an observer, you probably have heard it called a listener.

The Observer Pattern Defined

As always, we will start with the "Gang of Four" intent to set the stage for our discussion.

"Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically."

Thus, the observer pattern is precisely what the name implies. You assign an object to an observer, and when…