gistfile1.rb

ruby-1.9.2-p180 :001 > cat = Object.new
 => #<Object:0x0000010085bc58> 
ruby-1.9.2-p180 :002 > puts cat.methods.sort
!
!=
!~
<=>
==
===
=~
__id__
__send__
class
clone
define_singleton_method
display
dup
enum_for
eql?
equal?
extend
freeze
frozen?
hash
initialize_clone
initialize_dup
inspect
instance_eval
instance_exec
instance_of?
instance_variable_defined?
instance_variable_get
instance_variable_set
instance_variables
is_a?
kind_of?
method
methods
nil?
object_id
private_methods
protected_methods
public_method
public_methods
public_send
respond_to?
respond_to_missing?
send
singleton_class
singleton_methods
taint
tainted?
tap
to_enum
to_s
trust
untaint
untrust
untrusted?
 => nil
ruby-1.9.2-p180 :003 > cat.kind_of? Object
 => true