2008/7/24 matu <m / t.u>: > oh. i found out: it comes from Kernel. put this raises another question: are > all methods of Kernel available in Object? is Kernel always mixed in or > something like that? That's correct. The Kernel module is mixed into Object (and hence is available in every object as every object is a descendant of Object). Farrel -- Aimred - Ruby Development and Consulting http://www.aimred.com