// https://www.freecodecamp.org/learn/coding-interview-prep/data-structures/use--has-and--size-on-an-es6-set

function checkSet(arrToBeSet, checkValue) {
  // Only change code below this line
  const set = new Set(arrToBeSet);
  return [set.has(checkValue), set.size];
  // Only change code above this line
}