From: Dave Thomas <Dave@...>
Date: 2002-01-12T00:39:45+09:00
Subject: Re: "each" in iterator: confusion

"Albert L. Wagner" <alwagner@uark.edu> writes:

> I do not understand why this code runs forever.  Is it because
> the yield is taken to be a second yield in the super class
> "each"?  Is there a way to do such nested iterators?
> 
> class MyHash < Hash
>     def each(&block)
>         super.each do | k, v |
>             v2 = v * 2
>             yield( k, v2)
>         end
>     end
> end

'super' is not a pointer to the superclass's vtable, but the name of
the corresponding method in the superclass. Try

     def each(&block)
        super do | k, v |
            v2 = v * 2
            yield( k, v2)
        end
    end



Cheers


Dave