how to check if a set is a superset of another set in javascript

To check if a set is a superset of another set in JavaScript, you can use the Set.prototype.has() and Set.prototype.size methods.

Here's an example function that takes two sets and returns true if the first set is a superset of the second set, and false otherwise:

index.tsx
function isSuperset(set, subset) {
  for (let elem of subset) {
    if (!set.has(elem)) {
      return false;
    }
  }
  return true;
}
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You can use the function like this:

index.tsx
const setA = new Set([1, 2, 3, 4]);
const setB = new Set([2, 4]);
const setC = new Set([2, 5]);

console.log(isSuperset(setA, setB)); // true
console.log(isSuperset(setA, setC)); // false
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In this example, setA is a superset of setB, but not of setC. The function iterates over each element in the subset set and checks if it exists in the set set using the has() method. If the element does not exist in the set set, the function returns false. If all elements in the subset set exist in the set set, the function returns true.