how to get the symmetric difference of two sets in typescript

To get the symmetric difference of two sets in TypeScript, we can use the following algorithm:

1. Create a new Set to store the symmetric difference.
2. Loop through the elements of the first set using a for...of loop.
3. If the element is not in the second set, add it to the new Set.
4. Loop through the elements of the second set using a for...of loop.
5. If the element is not in the first set, add it to the new Set.
6. Return the new Set.

Here's the TypeScript code that implements this algorithm using the array spread operator to convert Sets to arrays:

index.ts
function symmetricDifference<T>(setA: Set<T>, setB: Set<T>): Set<T> {
  const diff = new Set([...setA].filter(x => !setB.has(x)));
  for (const elem of setB) {
    if (!setA.has(elem)) {
      diff.add(elem);
    }
  }
  return diff;
}
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This code defines a function named symmetricDifference that takes two Sets as arguments and returns a new Set that contains their symmetric difference. The type parameter T specifies the type of elements stored in the sets.

To use this function, you can create two Sets and call symmetricDifference:

index.ts
const set1 = new Set([1, 2, 3]);
const set2 = new Set([2, 3, 4]);
const diff = symmetricDifference(set1, set2);
console.log(diff); // Set { 1, 4 }
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