A HashSet in Rust is a collection that holds a unique value inside it and does not permit the entry of any duplicate values. HashSet is different from HashMap in the sense, that in HashSet, there is no key-value pair and the value or the data inside it, should be directly accessed.
The HashSet structure is defined inside the
std::collections of the Rust. And so to use the HashSet structure, this collection should be imported explicitly at the beginning of any program, which is using HashSet.
The syntax for importing the HashSet collection:
A HashSet can be created directly by using the static method