Kas saaksite selgitada, mis on objekti-iteraator ja kuidas seda programmeerimises kasutatakse?

Object iterator is a design pattern that provides a way to access the elements of a collection sequentially without revealing its internal structure.

The iterator typically implements methods for:

• getting the next element,
• checking if there are more elements,
• sometimes resetting or removing elements.

Example in pseudocode:

iterator = collection.get_iterator()
while iterator.has_next():
    item = iterator.next()
    process(item)

This allows abstraction from the specific data structure (list, tree, hash table) and working with elements sequentially and conveniently.