Can anyone tell me how this code sorts array ascendingly...this one blown me :*

JavaScript
1 
function ascendingOrder(arr) {
  return arr.sort(function(a, b) {
    return a - b;
  });
}
ascendingOrder([1, 5, 2, 3, 4]);
2

Because the sort function sorts the array based on the return value. If a - b returns a negative value, a is put before b in the array, so the lower number always gets put before bigger numbers, hence it’s sorted in an ascending way.

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