The actual result is different from expected, but test still pass.

Challenge Diff Two Arrays has an issue. User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36. Please describe how to reproduce this issue, and include links to screenshots if possible.

The actual result is different from expected, but test still pass.

Actual : expected
["pink wool", "diorite"] : ["diorite", "pink wool"]

My code:

function diffArray(arr1, arr2) {
  var newArr = [];
  var set = new Set([...arr1, ...arr2]);

  set.forEach(function (item) {
    if (arr1.indexOf(item) === -1 || arr2.indexOf(item) === -1) {
      newArr.push(item);
    }
  });
  

  return newArr;
}

diffArray(["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]);

[Manish-Giri]

@erictleung I’ll work on this. I will PM you the change I made before submitting a PR, so you can approve the wording.

[erictleung]

@Manish-Giri go for it! The “Note” part should be in <strong> tags by the way.