freeCodeCamp Intermediate Algorithm Scripting: Diff Two Arrays

diffArray.js

// Compare two arrays and return a new array with any items only found 
// in one of the two given arrays, but not both. In other words, return 
// the symmetric difference of the two arrays.

function diffArray(arr1, arr2) {

  return arr1.concat(arr2).filter(
    info => !arr1.includes(info) || !arr2.includes(info));
}

diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]);