From: Michael Garriss <mgarriss@...>
Date: 2003-08-01T07:09:07+09:00
Subject: Re: Extracting a parent class

Sorry...I should have been more clear.  While this works it does not 
mantain the state.   I would like all the members of 'b' that are class 
A members to be set in 'a'.

Daniel Carrera wrote:

>Answer:
>a = b.class.superclass.new
>
>Why:
>b.class == B
>b.class.superclass == A
>b.class.superclass.new == A.new
>
>Cheers,
>Daniel.
>
>On Fri, Aug 01, 2003 at 06:53:01AM +0900, Michael Garriss wrote:
>  
>
>>Sorry about the newbie question but....
>>
>>class A
>> attr_accessor :a
>>end
>>
>>class B < A
>> attr_accessor :b
>>end
>>
>>b = B.new
>>b.a = "some data"
>>b.b = "some more data"
>>a = b.?????
>>
>>How do I set 'a' from 'b' so that a is of class A and not class B?  I 
>>don't want the extra info, I want just the subset of members found in 
>>the parent class.  Is there a way to cast?
>>
>>TIA
>>Michael Garriss
>>
>>    
>>
>
>  
>