Standard Library Containers
Introduction to STL Containers
Learn what Standard Template Library (STL) containers are, how they eliminate manual memory management, and how to choose the right category of container for your data.
std::vector
Learn how to use std::vector in C++ to manage dynamically resizing arrays, understand the difference between size and capacity, and avoid iterator invalidation bugs.
Vector Size, Capacity, and Reallocation
Learn how std::vector manages memory behind the scenes, understand the performance costs of reallocation, and discover how to optimize capacity using shrink_to_fit.
std::deque
Learn how to use std::deque in C++ to manage double-ended queues, understand its segmented memory layout, and use its unique reference stability rules.
std::list and std::forward_list
Learn how to use std::list and std::forward_list in C++ to manage linked lists, understand their memory layout, and analyze their performance trade-offs.
std::set and std::unordered_set
Learn how to use std::set and std::unordered_set in C++ to store unique elements, understand their underlying tree and hash table mechanics, and perform fast lookups.
std::map and std::unordered_map
Learn how to use std::map and std::unordered_map in C++ to store key-value pairs, understand their performance differences, and safely look up elements.
std::stack, std::queue, and std::priority_queue
Learn how to use C++ container adaptors to manage LIFO, FIFO, and priority-sorted collections efficiently without exposing direct element access.
Choosing the Correct Container
Learn how to analyze your data access patterns, evaluate performance trade-offs, and choose the ideal C++ Standard Library container for your application.