How do I iterate safely under modification with std::set for large datasets?

When working with large datasets in C++, particularly when using `std::set`, safe iteration during modification is critical to avoid undefined behavior. The best approach is to make a copy of the `std::set` and iterate over that copy while allowing modifications on the original set. This ensures that you do not invalidate the iterator during modifications.

Example


        #include 
        #include 

        void safeIteration(std::set& dataSet) {
            // Create a copy of the original set for safe iteration
            std::set copyDataSet = dataSet;

            for (const int& value : copyDataSet) {
                std::cout << value << " ";

                // Perform modifications on the original set
                if (value % 2 == 0) {
                    dataSet.erase(value); // Remove even numbers from the original set
                }
            }
        }

        int main() {
            std::set mySet = {1, 2, 3, 4, 5, 6};
            safeIteration(mySet);

            // Print remaining elements in the original set
            std::cout << "\nRemaining elements: ";
            for (const int& value : mySet) {
                std::cout << value << " ";
            }

            return 0;
        }

C++ std::set Safe Iteration Modifications Large Datasets Iterators

How do I iterate safely under modification with std::set for large datasets?

Example

Popular Topics

Recent Languages

How do I iterate safely under modification with std::set for large datasets?

Example

Related Questions

Popular Topics

Recent Languages