Standard Library and STL

Comprehensive articles on the C++ Standard Library, STL containers, algorithms, and iterators.

Standard Library and STL

Powerful data processing with STL containers, algorithms, and iterators. Learn structures like vector, map, unordered_map and the <algorithm> toolbox with hands-on examples.

Goal: Choose the right container and algorithm to write performant and clean C++ code.

TL;DR

Containers: std::vector, std::list, std::deque.
Associative: std::map, std::unordered_map, std::set.
Algorithms: std::sort, std::find, std::accumulate.
Iterators & range-based for, std::string_view.

Overview of the C++ Standard Library

31 August 2026 • Standard Library and STL

Learn the C++ Standard Library, including STL containers, algorithms, iterators, and essential components for modern C++ development.

C++ C++ STL

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Using std::vector in C++

31 August 2026 • Standard Library and STL

Learn how to use std::vector in C++ for dynamic arrays, efficient element management, and practical programming examples.

Arrays C++ C++ STL

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Sequential Data Structures with std::list and std::deque in C++

31 August 2026 • Standard Library and STL

Learn how to use std::list and std::deque in C++, including performance differences, use cases, and sequential data management.

C++ C++ STL

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Key-Value Structures with std::map and std::unordered_map in C++

13 September 2026 • Standard Library and STL

Learn how to use std::map and std::unordered_map in C++ for efficient key-value storage, fast lookups, and practical applications.

C++

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Unique Elements with std::set and std::multiset in C++

13 September 2026 • Standard Library and STL

Learn std::set and std::multiset in C++ to manage unique elements, ordered collections, and efficient search operations.

C++

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Using std::stack, std::queue, and std::priority_queue in C++

1 October 2026 • Standard Library and STL

Learn how to use std::stack, std::queue, and std::priority_queue in C++ for efficient data processing and algorithm design.

C++ Queues Stacks

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pair, tuple, and Structured Binding in C++

1 October 2026 • Standard Library and STL

Learn pair, tuple, and structured binding in C++ to manage multiple values and write cleaner, more modern code.

C++ Pair Tuple

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The C++ algorithm Library: sort, find, count

2 October 2026 • Standard Library and STL

Learn the C++ algorithm library, including sort, find, count, and other STL algorithms for efficient data processing.

Algorithms C++ C++ STL

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Lightweight String Handling with std::string_view in C++

4 October 2026 • Standard Library and STL

Learn std::string_view in C++ to perform fast, lightweight string operations without unnecessary string copying.

C++ String Handling

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Iterators and Their Use in the C++ STL

4 October 2026 • Standard Library and STL

Learn iterators in C++ and how they work with STL containers and algorithms to traverse and manipulate data efficiently.

C++ C++ STL Iterators

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In C++, using auto improves readability when the type is obvious or very long. It helps focus on what the code does instead of how the type is written.


std::map<int, std::string> users;

// long and noisy
std::map<int, std::string>::iterator it = users.begin();

// clearer
auto it = users.begin();

In C++, moving constant values outside of loops improves readability and avoids repeating the same value inside the loop.


// less clear
for (int i = 0; i < 10; i++)
{
    process(i);
}

// clearer
const int limit = 10;
for (int i = 0; i < limit; i++)
{
    process(i);
}

In C++, functions should do only one thing. Single-purpose functions are easier to read, test, and maintain.


// does too many things
void processUser(User user)
{
    validate(user);
    saveToDatabase(user);
    sendEmail(user);
}

// better: single responsibility
void validateUser(User user);
void saveUser(User user);
void sendWelcomeEmail(User user);

In C++, avoid using magic numbers. Defining meaningful constants makes the code easier to understand and maintain.


// magic number
if (retryCount > 3)
{
    stop();
}

// better
const int maxRetries = 3;
if (retryCount > maxRetries)
{
    stop();
}

In C++, prefer using nullptr instead of NULL. nullptr is type-safe and avoids ambiguous comparisons.


int* ptr = nullptr;

if (ptr == nullptr)
{
    // safe null check
}