From: Ilan Berci <coder68@...>
Date: 2007-03-30T00:34:41+09:00
Subject: Re: Newbie question about dynamic class overriding

Emil wrote:

> 
> def sign_with_CA_two
>     class WIN32OLE
>       alias oldSend(str) Send(str)
>       def Send(str)
>         oldSend(str)
>         sleep 0.1
>       end
>     end
>     @auto.Send("{a}")
>     @auto.Send("{b}")
>     @auto.Send("{1}")
>     @auto.Send("{2}")
> end
> 

Emil,

While I am not certain, it seems like a singleton method may be the 
approach you are looking for:

irb(main):001:0> class A
irb(main):002:1> def send; "send"; end
irb(main):003:1> end
=> nil
irb(main):004:0> a = A.new
=> #<A:0x38665c>
irb(main):005:0> def a.send; super + '_version2' ; end
=> nil
irb(main):006:0> a.send
=> "send_version2"
irb(main):007:0> A.new.send
=> "send"

just define a singleton method in the instance that you want to have 
alternate behavior..

If you really need the inheritance case, then you can use the following:

irb(main):008:0> class B < A
irb(main):009:1> def send; super + '_versionB'; end
irb(main):010:1> end
=> nil
irb(main):011:0> B.new.send
=> "send_versionB"

hope this helps

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