Trying to solve symmetric difference using Javascript

Question

I am trying to figure out a solution for symmetric difference using javascript that accomplishes the following objectives:

• accepts an unspecified number of ar

Answer 1

Another simple, yet readable solution:

 
/*
This filters arr1 and arr2 from elements which are in both arrays
and returns concatenated results from filtering.
*/
function symDiffArray(arr1, arr2) {
  return arr1.filter(elem => !arr2.includes(elem))
             .concat(arr2.filter(elem => !arr1.includes(elem)));
}

/*
Add and use this if you want to filter more than two arrays at a time.
*/
function symDiffArrays(...arrays) {
  return arrays.reduce(symDiffArray, []);
}

console.log(symDiffArray([1, 3], ['Saluton', 3])); // [1, 'Saluton']
console.log(symDiffArrays([1, 3], [2, 3], [2, 8, 5])); // [1, 8, 5]

Used functions: Array.prototype.filter() | Array.prototype.reduce() | Array.prototype.includes()