Java
ArrayList Deep Dive
Deep dive into ArrayList internals: dynamic array backing, 1.5x growth strategy, capacity management, O(1) random access, and production patterns for pre-sizing.
Algorithms
ArrayList vs LinkedList
Visual comparison of ArrayList vs LinkedList: see operation complexity differences side-by-side. Know when to use which.
Algorithms
ArrayList / Dynamic Array
Visual guide to ArrayList: dynamic resizing, amortized O(1) append, O(n) insert. Interactive visualizer shows resize operations.