Learning JavaScript Data Structures and Algorithms - Third Edition

Simulating the union operation

To add all the elements from two sets, we can create a function that will return a new set with all elements from set1 and set2. We need to iterate set1 ({1}) and set2 ({2}) and add all their elements into the union set using add, as demonstrated by the following code:

const union = (set1, set2) => {  const unionAb = new Set();  set1.forEach(value => unionAb.add(value));  set2.forEach(value => unionAb.add(value));  return unionAb;};console.log(union(setA, setB)); // {1, 2, 3, 4}