From: Learning Ruby <learningruby@...>
Date: 2006-11-03T22:58:24+09:00
Subject: Re: Output not clear

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On 11/3/06, Rimantas Liubertas <rimantas@gmail.com> wrote:
>
> > More confusion. I thought that the statement balance = @bal - amt in the
> > withdraw method is actually the set method for the @balance variable of
> the
> > Accounts class. Is not the set method inherited in the Savings class?
>
> This is true. However in the case something = some_value Ruby sees it
> as assignment to local variable. In this case you want self.balance  =
> @bal - amt
> instead of balance = @bal - amt.
>
>
> Regards,
> Rimantas
>

Thanks. That clarified my confusion. One more related thing that confuses me
is that I thought all instance variables of a class are private to the
class. Then are the private instance variables inherited by a sub-class? If
yes, then in my Accounts program, there is no real need to the write the
attr_accessor statement?

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