Iterator pattern pruža način da prođete kroz kolekciju sekvencijalno bez izlaganja njene unutarnje strukture. To je toliko fundamentalno da je ugrađeno u većinu modernih jezika (for-of petlje, iteratori, generatori).
Što Iterator pattern radi
ITERATOR → access elements of a collection SEQUENTIALLY without exposing its internals:
→ provides a standard way to traverse (next element, has more?)
→ the collection's internal structure (array, tree, linked list) is HIDDEN
→ decouples traversal logic from the collection
→ "iterate without caring how the collection is structured"
