From: Robert Klemme <bob.news@...>
Date: 2004-03-31T16:29:23+09:00
Subject: Re: Silly question...


"Simon Strandgaard" <neoneye@adslhome.dk> schrieb im Newsbeitrag
news:pan.2004.03.31.06.29.43.124211@adslhome.dk...
> On Wed, 31 Mar 2004 07:20:18 +0000, GGarramuno wrote:
> > Is there any way of completely remove a class object's methods instead
of
> > extending the class?
> [snip]
> > I'm finding the above to be a major pain when debugging and
prototyping new
> > code in either irb or an embedded ruby, every time I reload a library.
>
>
> Will an 'alias' help you?   like this
>
> server> ruby a.rb
> 1
> 3
> 1
> server> cat a.rb
> class A
>   attr :t
>   def initialize
>     @t = 1
>   end
> end
> a = A.new
> puts a.t   # => 1
>
> # Not extending... redefining here....
> class A
>   attr :x
>   alias old_initialize initialize
>   def initialize
>     old_initialize
>     @x = 3
>   end
> end
> a = A.new
> puts a.x   # => 3
> puts a.t   # => 1
> server>

I don't think that's what the OP wanted.  This seems to be more
appropriate

class A
   attr :t
   def initialize
       @t = 1
   end
end

a = A.new
puts a.t   # => 1

# Not extending... redefining here....
class A
   remove_method :t
   attr :x
   def initialize
       @x = 3
   end
end

a = A.new
puts a.x # => 3
puts a.t # => error, instead of outputing nil

yields

irb(main):022:0> puts a.t # => error, instead of outputing nil
NoMethodError: undefined method `t' for #<A:0x101a6448 @x=3>
        from (irb):22
        from :0

Regards

    robert