Sequence on processing methods

Tell us what’s happening:
Describe your issue in detail here.
In which sequence the processing of the methods, concat and sort, goes? Which one interpreted first?

  **Your code so far**
const globalArray = [5, 6, 3, 2, 9];

function nonMutatingSort(arr) {
// Only change code below this line
return [].concat(arr).sort((a, b) => {
  return a - b;
// Only change code above this line

  **Your browser information:**

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Challenge: Return a Sorted Array Without Changing the Original Array

Link to the challenge:

You’re calling concat on the empty array [], and then calling sort on the return value of that. So, concat then sort.