Hi, Both superclass as well as ancestors should do the trick Integer.ancestors would give you [Integer, Precision, Numeric, Comparable, Object, Kernel] while Integer.superclass would give you Numeric I guess, you'll have to do some comparison after this. regs Vivek On Tue, 4 Jun 2002, Matthias Veit wrote: > > Hi, > > I miss a convenient way to ask a class, if it is a subclass of > a given superclass (like is_a?, kind_of? for instances). > > I wish I could type something like: > > Integer.is_superclass?(Fixnum) > > Is there a possiblity, I did not know to achieve this? > > Best regards, > Matthias > > _________________________________________________________ > Do You Yahoo!? > Get your free @yahoo.com address at http://mail.yahoo.com > -- Grabel's Law: 2 is not equal to 3 -- not even for large values of 2.