How does C++11 handle hash usage in std::map?

Can you explain how hash functions are used in std::map in C++11?

In C++11, std::map uses a balanced binary tree structure, not hash functions. For hash-based containers, use std::unordered_map.

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

std::unordered_map offers average constant time complexity for lookups, while std::map has logarithmic time complexity.

Are there any specific use cases where std::map is preferred?

Yes, std::map is preferred when you need ordered elements or when you require range queries.

Can I customize the hash function for std::unordered_map?

Yes, you can provide a custom hash function by defining a struct and passing it as a template parameter.