Quicksort in CSS (SASS)

quicksort.scss

@function swap($list, $first, $second) {
  @if ($first == $second) {
    @return $list;
  }
  $temp: nth($list, $first);
  $list: set-nth($list, $first, nth($list, $second));
  $list: set-nth($list, $second, $temp);
  @return $list;
}

@function quicksort-impl($list, $first, $last) {
  @if (($last - $first) < 2) {
    @return $list;
  }
  
  $i: $first + 1;
  $j: $last - 1;
  $pivot: nth($list, $first);
  
  @while $i != $j {
    @while ($i != $j) and (nth($list, $i) < $pivot) {
      $i: $i + 1;
    }
    @while ($i != $j) and (nth($list, $j) > $pivot) {
      $j: $j - 1;
    }
    @if ($i != $j) {
      $list: swap($list, $i, $j);
      $i: $i + 1;
    }
  }
  @if nth($list, $i) > $pivot {
    $i: $i - 1;
  }
  $list: swap($list, $first, $i);
  
  $list: quicksort-impl($list, $first, $i);
  $list: quicksort-impl($list, $i + 1, $last);
  
  @return $list;
}

@function quicksort($list) {
  $list: quicksort-impl($list, 1, length($list) + 1);
  @return $list;
}

div {
  font-size: quicksort((1px, 9px, 4px, -3px, 6px, 8px, -2px, 10px));
}