Skip to main content

symmetricDifferenceWith

JS TODO

Returns the symmetric difference between two arrays, using a provided function as a comparator.

Use Array.prototype.filter() and Array.prototype.findIndex() to find the appropriate values.

const symmetricDifferenceWith = (arr, val, comp) => [
...arr.filter((a) => val.findIndex((b) => comp(a, b)) === -1),
...val.filter((a) => arr.findIndex((b) => comp(a, b)) === -1),
];
symmetricDifferenceWith(
[1, 1.2, 1.5, 3, 0],
[1.9, 3, 0, 3.9],
(a, b) => Math.round(a) === Math.round(b)
); // [1, 1.2, 3.9]