Show smallest and largest in a structure list

Kirby 3
10

Even if you have two items, they can be the same?

 <?php if ($page->listing()->toStructure()->isNotEmpty()) {

    $items = $page->listing()->toStructure()->sortBy('race_km', 'asc')->filter(fn($item) => empty($item->race_km()->value()) === false);
    $min   = $items->first()->race_km();
    $max   = $items->last()->race_km();
    echo $min === $max ?  $min . ' km' : $min . ' à ' . $max . ' km';
}