What are the best practices for implementing hash functions in C++11?

What are the best practices for implementing hash functions in C++11?

When implementing hash functions in C++11, consider using std::hash for standard types, ensuring uniform distribution, and avoiding collisions.

Can you explain how to use std::hash effectively?

Certainly! std::hash is a template class that provides a default hash function for various types. You can create a custom hash function by specializing std::hash for your own types.

What should I avoid when creating a hash function?

Avoid using mutable data members in your hash function, as they can lead to inconsistent hash values. Also, ensure that your hash function is efficient and minimizes collisions.

How can I test the performance of my hash function?

You can test the performance by measuring the time it takes to insert and retrieve elements in a hash table, and by analyzing the distribution of hash values.