Object#inspect's output

ruby-talk
1

Hi,

I want to understand thoroughly how singleton objects are
implemented. I try this:

  class C ; end

  puts C.inspect # => C
  puts class <<C ; self ; end.inspect # => #<Class:C>

Can someone give me a hint what's the difference between the
both objects inspected? Thanks very much in advance.

Bertram

···

--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de

2

Bertram Scharpf wrote:

Hi,

I want to understand thoroughly how singleton objects are
implemented. I try this:

  class C ; end

  puts C.inspect # => C
  puts class <<C ; self ; end.inspect # => #<Class:C>

Can someone give me a hint what's the difference between the
both objects inspected? Thanks very much in advance.

The second object is the metaclass of C. There's a good explanation of metaclasses in the PickAxe book.

3

Hi,

Bertram Scharpf wrote:
>I want to understand thoroughly how singleton objects are
>implemented. I try this:
>
> class C ; end
>
> puts C.inspect # => C
> puts class <<C ; self ; end.inspect # => #<Class:C>

The second object is the metaclass of C. There's a good explanation of
metaclasses in the PickAxe book.

Ah, I see.

  class C ; def self.clsmeth() end end
    # => nil
  class <<C ; self ; end.instance_methods - Class.methods
    # => ["clsmeth"]

Thanks.

Bertram

···

Am Donnerstag, 10. Mär 2005, 03:10:57 +0900 schrieb Joel VanderWerf:

--
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de