Java
Queue, Deque, and ArrayDeque
Master queue abstractions: FIFO Queue interface, double-ended Deque, ArrayDeque's circular buffer implementation beating LinkedList and deprecated Stack.
Java
LinkedList Deep Dive
Analyze LinkedList's doubly-linked structure, ~40 bytes per node overhead, O(n) random access limitations, and when LinkedList actually outperforms ArrayList.
Algorithms
ArrayDeque / Circular Buffer
Visual guide to ArrayDeque: circular buffer, O(1) operations at both ends. Watch head/tail pointers wrap around.