Complete Modern C++ - std::hash (C++11)

This video tutorial explains how to write a hash function for custom data types, focusing on creating instances of hash clauses for string types and the importance of overloading comparison operators for STL containers. It also covers creating function objects for hashing and equality in unordered containers, specifically for employee objects, and concludes with a preview of the next video on performance comparison of containers.

How is the hash value computed for a custom data type?

What are the two things needed for unordered containers when using custom data types?