Symmetric Difference of Arrays in JavaScript

The symmetric difference of two arrays are the elements that are present in either one or the other array, but not in both. This means that an element is present in the first array but not in the second, or vice versa.

This is useful when you want to compare two arrays and identify the elements that are unique in each array. On the other hand, using one set alone would only remove duplicates, but would not provide information about the unique elements relative to other sets.

Here’s an example to illustrate this difference:

const arrayA = [1, 2, 3, 4];
const arrayB = [3, 4, 5, 6];

const union = new Set([...arrayA, ...arrayB]);
console.log(Array.from(union));
// Output: [1, 2, 3, 4, 5, 6]

const symmetricDifference = (arrayA, arrayB) => {
    // ...
};

const difference = symmetricDifference(arrayA, arrayB);
console.log(difference);
// Output: [1, 2, 5, 6]

Typically, I would use the _.xor()…

The symmetric difference of two arrays are the elements that are present in either one or the other array, but not in both. This means that an element is present in the first array but not in the second, or vice versa.

This is useful when you want to compare two arrays and identify the elements that are unique in each array. On the other hand, using one set alone would only remove duplicates, but would not provide information about the unique elements relative to other sets.

Here’s an example to illustrate this difference:

const arrayA = [1, 2, 3, 4];
const arrayB = [3, 4, 5, 6];

const union = new Set([...arrayA, ...arrayB]);
console.log(Array.from(union));
// Output: [1, 2, 3, 4, 5, 6]

const symmetricDifference = (arrayA, arrayB) => {
    // ...
};

const difference = symmetricDifference(arrayA, arrayB);
console.log(difference);
// Output: [1, 2, 5, 6]

Typically, I would use the _.xor()…