_wp_object_count_sort_cb() │ WP 3.1.0

Serves as a callback for comparing objects based on count.

Used with uasort().

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Return

Int. Negative number if $a->count is less than $b->count, zero if they are equal, or greater than zero if $a->count is greater than $b->count.

Usage

_wp_object_count_sort_cb( $a, $b );
$a(object) (required)
The first object to compare.
$b(object) (required)
The second object to compare.

Changelog

Since 3.1.0 Introduced.

_wp_object_count_sort_cb() code WP 6.5.2

wp-includes/category-template.php 
function _wp_object_count_sort_cb( $a, $b ) {
	return ( $a->count - $b->count );
}