Hi, I have bock to tinker a small file system. A filesystem is in the end, a tree. Normally a B-tree or a (B+)-tree is used to realize a filesystem. I thought why not make the whole thing OOP.
The Observer pattern, is a design pattern from Object Oriented Programming. This pattern is intended to make things easier for us.
The Decorator pattern is a design pattern from Object Oriented Programming. It is intended to facilitate an extension of objects. Let's imagine we have a small ordering platform where we sell cars. Where the cars come from doesn't matter. The cars have to be created as objects in our program.