What are some tips for using std::map in C++11?

What are some tips for using std::map in C++11?

When using std::map in C++11, consider using emplace() for efficient insertion and avoid unnecessary copies.

Can you explain how emplace() works?

Sure! emplace() constructs an element in place, which can be more efficient than insert() because it avoids copying.

What are the advantages of using std::map over std::unordered_map?

std::map maintains order and allows for range queries, while std::unordered_map offers faster average access time.

Are there any performance considerations I should be aware of?

Yes, std::map has logarithmic time complexity for insertions and lookups, while std::unordered_map has average constant time.

How can I iterate over a std::map?

You can use a range-based for loop or an iterator to traverse a std::map. For example: for (const auto& pair : myMap) { ... }.