Have you used the std::unordered_map container in practice for storing and quick data access?

Yes, the std::unordered_map container is widely used for storing data with fast access by key due to its hash table implementation, which provides amortized constant time access O(1).

Example of usage:

#include <iostream>
#include <unordered_map>
#include <string>

int main() {
    std::unordered_map<std::string, int> ages;
    ages["Ivan"] = 25;
    ages["Maria"] = 30;

    // Fast access by key
    std::cout << "Maria's age: " << ages["Maria"] << std::endl;

    return 0;
}

std::unordered_map is convenient when search speed is important and element ordering is not required.