How do I insert and erase elements efficiently with std::multimap?

Efficient insertion and erasure in std::multimap, C++ multimap example, C++ associative containers
This article discusses how to efficiently insert and erase elements in a std::multimap in C++. It also provides examples to demonstrate these operations.
#include <iostream> #include <map> int main() { std::multimap mmap; // Inserting elements mmap.insert({1, "Apple"}); mmap.insert({2, "Banana"}); mmap.insert({1, "Avocado"}); mmap.insert({3, "Cherry"}); std::cout << "Elements in multimap after insertion:\n"; for (const auto& pair : mmap) { std::cout << pair.first << ": " << pair.second << '\n'; } // Erasing elements (erase by key) mmap.erase(1); // This will remove all entries with key 1 std::cout << "\nElements in multimap after erasing key 1:\n"; for (const auto& pair : mmap) { std::cout << pair.first << ": " << pair.second << '\n'; } return 0; }

Efficient insertion and erasure in std::multimap C++ multimap example C++ associative containers

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