What are Map and Set in JavaScript?

const map = new Map();
map.set("name", "Robin");
map.set(1, "one");
console.log(map.get("name"));
console.log(map.size);

const set = new Set([1, 2, 2, 3]);
console.log(set);
console.log(set.has(2));

Output:

A Map is like an object, but keys can be of any type and it has a size. A Set keeps only unique values, so [...new Set(array)] removes duplicates.

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