I am working back through the intermediate JS algorithms section (trying to get enough repetition that they all seem easy). The following answer is, I thought, the one I had used a previous time.
function diffArray(arr1, arr2) {
var newArr = [];
// Same, same; but different.
newArr = arr1.concat(arr2);
return newArr.filter(function (item,pos) {
return newArr.indexOf(item) == pos;
});
}
diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]);
But it isn’t working. Looking at the browser console, I’m getting the following error:
Source map error: request failed with status 404 Resource URL: https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays Source Map URL: normalize.min.css.map
Does anyone have any idea what I need to do or what the problem is?