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I'll explain it by example:

a = "a"
#=> "a"
class << a
   def fooify
    return "foo #{self}"
   end
end

a.fooify
#=> "foo a"
b = "b"
#=> "b"
b.fooify
#NoMethodError: undefined method `fooify' for "b":String
#	from (irb):9
#	from :0


On Aug 20, 2008, at 6:31 PM, Iñáki Baz Castillo wrote:

> Hi, I know that I can extend a Class instance (an object) with a
> method(s) by doing:
>
>  object.extend Module
>
> but can I do it in a "inline" way without the need of a module?
> I just want something as follows:
>
>  time = Time.now
>  object.add_method 'def say_time(); return time; end'
>
>  irb> object.say_time
>  --> time
>
> Note that I **don't** want to include the "add_method" in object class
> or in Object class. This is, I don't want to "dirty" object class.
>
> Also note that I can't use "object.extend Module" since the method
> "say_time" must return a variable "time" value that I pass as an
> argument.
>
> Is there some way? Thanks a lot.
>
>
> -- 
> Iñáki Baz Castillo
> <ibc / aliax.net>

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