Using a Iterator Design Pattern in the LinkedListUS Class

[JamesIGT]

The implementation of the Iterator design pattern improves encapsulation and facilitates traversing the list, avoiding exposure of its internal structure while remaining open to extension, thus adhering to the Open/Closed Principle (OCP). The iteration logic is separated into the LinkedListIterator class, aligning with the Single Responsibility Principle (SRP), which enhances code maintainability and flexibility. However, this redesign introduces a slight additional cost in memory and processing due to the creation of the iterator, although the impact is minimal.