How do I remove duplicates with std::unordered_map?

In C++, you can use `std::unordered_map` to remove duplicates from a collection of elements efficiently. The idea is to store each element in the map as a key, which inherently handles duplicates since keys in a map must be unique. Here’s a simple example demonstrating how to achieve this:


    #include 
    #include 
    #include 

    int main() {
        std::vector numbers = {1, 2, 3, 1, 2, 4, 5};
        std::unordered_map uniqueNumbers;

        for (const int& num : numbers) {
            uniqueNumbers[num] = true; // Insert the number as key
        }

        std::cout << "Unique numbers are: ";
        for (const auto& pair : uniqueNumbers) {
            std::cout << pair.first << " "; // Access the keys to print unique numbers
        }
        std::cout << std::endl;

        return 0;
    }

How do I remove duplicates with std::unordered_map?

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How do I remove duplicates with std::unordered_map?

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