Is there a connection between the data structures Map and Set?

Map and Set are data structures commonly used for storing collections of elements, but they have important relationships and differences.

• Set stores unique values without keys. It is similar to a mathematical set — each element appears only once.
• Map stores key-value pairs, where keys are unique, and values can repeat.

The connection between them is that a Set can be viewed as a special case of a Map, where keys and values are the same. For example, in JavaScript, a Set can be represented as a Map where the value equals the key.

Example in JavaScript:

const set = new Set([1, 2, 3]);
const map = new Map([[1, 1], [2, 2], [3, 3]]);

Here, the set stores unique elements, and the map stores key-value pairs where the key and value are the same.

Thus, both structures ensure the uniqueness of keys/elements, but Map additionally links a key to its corresponding value.