Fun with printing tables with std::format and C++20
Const collection of unique_ptr, options and design choices

C++ Map Explained with Examples
Map in C++ Standard Template Library (STL)

How to use range-based for() loop with std::map?
std::map::at
How to find if a given key exists in a C++ std::map
C++: std::map throws an out_of_range exception

At Map C++
C++ map at()

// 
for (const auto& [key, value]: myMap) {
    std::cout << key << " has value " << value << std::endl;
}

Structured binding declaration
A brief introduction to C++ structured binding
Structured binding in C++

for (const auto& kv : myMap) {
    std::cout << kv.first << " has value " << kv.second << std::endl;
}

Range-based for loop
Range-based for loop in C++
Range-based for Statement (C++)