What are some effective hashing techniques in C++17?

What are some effective hashing techniques in C++17?

In C++17, you can use std::unordered_map and std::hash for efficient hashing. Would you like to know more about specific techniques?

Yes, can you explain how std::hash works?

Certainly! std::hash is a function object that provides a hash value for a given input. It's specialized for various types like integers, strings, and pointers.

Are there any custom hashing techniques I can implement?

Absolutely! You can create a custom hash function by defining a struct with an operator() that takes your data type and returns a size_t hash value.

Can you give me an example of a custom hash function?

Sure! Here's a simple example for a struct:

struct CustomHash {
    size_t operator()(const MyStruct& s) const {
        return std::hash<int>()(s.id) ^ std::hash<std::string>()(s.name);
    }
};