JavaScript Program to Illustrate Different Set Operations

function showUnion(sA, sB) {
    const union = new Set(sA);
    for (const num of sB) {
        union.add(num);
    }
    return union;
}
const s1 = new Set(['1', '6', '8']);
const s2 = new Set(['2', '3', '4']);
console.log(showUnion(s1, s2));

function getIntersection(set1, set2) {
    const ans = new Set();
    for (let i of set2) {
        if (set1.has(i)) {
            ans.add(i);
        }
    }
    return ans;
}
const set1 = new Set([1, 2, 3, 8, 11]);
const set2 = new Set([1, 2, 5, 8]);

const result = getIntersection(set1, set2);
console.log(result);

let A = [7, 2, 6, 4, 5];
let B = [1, 6, 4, 9];
const set1 = new Set(A);
const set2 = new Set(B);

const difference = new Set();
set1.forEach(element => {
    if (!set2.has(element)) {
        difference.add(element);
    }
});
console.log([...difference]);

function subSet(val1, val2) {
    // Get an iterator for val2
    const iterator = val2.values();

    let nextVal = iterator.next();

    while (!nextVal.done) {
        if (!val1.has(nextVal.value)) {
            return false;
        }
        nextVal = iterator.next();
    }

    return true;
}

// Two sets
const val1 = new Set(['HTML', 'CSS', 'Javascript']);
const val2 = new Set(['HTML', 'CSS']);

const result = subSet(val1, val2);

console.log(result);