This chapter covers the Null Object pattern.
Definition
It’s not a GoF design pattern. Here’s the definition from Wikipedia:
“In object-oriented computer programming, a null object is an object with no referenced value or with defined neutral (‘null’) behavior. The null object design pattern describes the uses of such objects and their behavior (or lack thereof). It was first published in the Pattern Languages of Program Design book series.”
Concept
The pattern can implement a “do-nothing” relationship, or it can provide ...
