01How is the unification of behavior elements of UICollectionView and UITableView implemented in iOS?Junior — MiddleOZON201
02How can cyclic references in memory management be eliminated to prevent leaks?Junior — MiddleOZON186
03Can you explain what the Optional class in Java is and what it is used for?Junior — MiddleUzumСуши ВокAppMaster+4173
