How do I use advanced iterators with unordered maps in C++11?

How do I use advanced iterators with unordered maps in C++11?

In C++11, you can use iterators to traverse unordered maps. Would you like to see an example?

Yes, please provide an example of using iterators with unordered maps.

Here's a simple example:

#include <iostream>
#include <unordered_map>

int main() {
    std::unordered_map<int, std::string> myMap = {{1, "one"}, {2, "two"}, {3, "three"}};
    for (auto it = myMap.begin(); it != myMap.end(); ++it) {
        std::cout << it->first << " : " << it->second << std::endl;
    }
    return 0;
}

This code iterates through the unordered map and prints each key-value pair.

What are the advantages of using unordered maps over regular maps?

Unordered maps offer average constant time complexity for insertions and lookups, making them faster than ordered maps for many use cases.

Are there any limitations to using unordered maps?

Yes, unordered maps do not maintain the order of elements, and they may use more memory due to their underlying hash table implementation.