hash in C++ | std::hash in C++
In this video we will learn what is std::hash in c++11.
std::hash is a template class defined in the C++ Standard Library header "functional". It is used to generate hash values for objects of various types. Hashing is a process of mapping data of arbitrary size to a fixed-size value, typically for use in data structures such as hash tables or hash-based data structures like std::unordered_map, std::unordered_set, etc.
std::hash provides a default hash function for built-in types and allows users to specialize it for their custom types.
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