stdunorderedmapstdstring

std::unordered_map<std::string> is a container in the C++ Standard Library that provides a way to store key-value pairs with unique keys. It is part of the unordered associative containers, which are implemented as hash tables. This container offers average constant-time complexity for search, insertion, and deletion operations, making it a highly efficient choice for scenarios where fast access to elements is required.

The keys in an std::unordered_map<std::string> must be unique and of type std::string. The values can be of any data type. The container automatically manages the memory for the stored elements, and it does not maintain any specific order for the elements.

The std::unordered_map<std::string> container provides several member functions to manipulate the stored elements, such as insert, erase, find, and count. It also supports iterators to traverse the elements in the container.

One of the key features of std::unordered_map<std::string> is its ability to handle hash collisions. When two keys have the same hash value, the container uses a collision resolution strategy, typically chaining or open addressing, to store the elements and maintain efficient access times.

In summary, std::unordered_map<std::string> is a powerful and efficient container in the C++ Standard Library for storing and managing key-value pairs with unique keys. Its average constant-time complexity for search, insertion, and deletion operations makes it a suitable choice for various applications where fast access to elements is crucial.