How do I use emplace vs push with std::map?

The C++ Standard Library provides several containers, including `std::map`, which is a sorted associative container that contains key-value pairs. When adding elements to a `std::map`, two commonly used methods are `push` and `emplace`. However, the `std::map` class specifically does not have a `push` method. Instead, the `insert` and `emplace` methods are used for adding elements.

Using `emplace`: This method constructs the element in-place by forwarding the provided arguments to the constructor of the key-value pair. It can be more efficient since it eliminates the need for a temporary object.

Using `insert`: This method adds a new element to the map. It requires you to create a temporary key-value pair object before using it to insert into the map.


            #include 
            #include 
            
            int main() {
                std::map myMap;

                // Using emplace
                myMap.emplace(1, "One");
                myMap.emplace(2, "Two");

                // Using insert
                myMap.insert(std::make_pair(3, "Three"));

                // Display the map contents
                for (const auto& pair : myMap) {
                    std::cout << pair.first << ": " << pair.second << std::endl;
                }

                return 0;
            }

cpp std::map emplace insert key-value pairs C++ containers associative containers

How do I use emplace vs push with std::map?

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How do I use emplace vs push with std::map?

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