WooCommerce - Sort attributes by name

<?php
  // Sorts attributes alphabetically on the Attributes page and in the select dropdown on product pages
  // not tested exhaustively!
  // Code goes in functions.php of your child theme

  add_filter('woocommerce_attribute_taxonomies', 'custom_attribute_sort');
  function custom_attribute_sort($array) {
    usort($array, 'compareName');
    return $array;
  }

  function compareName($attribute_1, $attribute_2) {
    if ($attribute_1->attribute_name == $attribute_2->attribute_name) {
      return 0;
    }
    return ($attribute_1->attribute_name < $attribute_2->attribute_name) ? -1 : 1;
  }