In JavaScript there is a method entries() that returns an iterator object with array of the key and value for each item in the Set. But key and value in Set are the same thing. So what would be the use case for this, especially given the other iterator methods that exist for Set?

e.g.

const mySet = new Set([1,2,3]);
for (let arr of mySet.entries()) console.log(arr)

// Outputs:
// [1,1]
// [2,2]
// [3,3]