`<unordered_map>`

Defines the container class templates unordered_map and unordered_multimap and their supporting templates.

Syntax

#include <unordered_map>

Note

The <unordered_map> library also uses the #include <initializer_list> statement.

Class	Description
unordered_map Class	Stores hash table of {key, mapped} pairs.
unordered_multimap Class	Stores hash table of {key, mapped} pairs.

Function	Description
operator!=	Tests if the unordered_map object on the left side of the operator is not equal to the unordered_map object on the right side.
operator==	Tests if the unordered_map object on the left side of the operator is equal to the unordered_map object on the right side.
swap Function (unordered_map)	Swaps two maps.
operator!=	Tests if the unordered_multimap object on the left side of the operator is not equal to the unordered_multimap object on the right side.
operator==	Tests if the unordered_multimap object on the left side of the operator is equal to the unordered_multimap object on the right side.
swap Function (unordered_map)	Swaps two multimaps.