/**
* This method returns the length of the collection.
*
* @access public
* @final
* @return int the length of the collection
*/
public final function count() : int
{
return $this->xs->__length();
}
/**
* This method compares the operands for order.
*
* @access public
* @static
* @param ILinkedList\Type $xs the left operand
* @param ILinkedList\Type $ys the right operand
* @return ITrit\Type the order as to whether the left
* operand is less than, equals to,
* or greater than the right operand
*/
public static function compare(ILinkedList\Type $xs, ILinkedList\Type $ys) : ITrit\Type
{
for ($as = $xs, $bs = $ys; !$as->__isEmpty() && !$bs->__isEmpty(); $as = $as->tail(), $bs = $bs->tail()) {
$r = $as->head()->compare($bs->head());
if ($r->unbox() != 0) {
return $r;
}
}
return ITrit\Type::box($xs->__length() <=> $ys->__length());
}
