Re: [Rd] attributes of environments

From: Gabor Grothendieck <>
Date: Wed 05 Jul 2006 - 18:23:58 GMT

On 7/5/06, Simon Urbanek <> wrote:
> Gabor,
> On Jul 5, 2006, at 1:16 PM, Gabor Grothendieck wrote:
> >> It really is the way R is designed to work. Whether it is a
> >> problem or not is a separate issue. Environments really are
> >> references, not values, and they really work differently from the
> >> way most other objects work.
> >
> > OK. Its not a bug but as we discuss this it seems to me that its
> > current operation is undesirable
> We discuss it only because *you* think it's undesirable...
> > since environments don't seem to fit into the scheme that other
> > objects do yet different design/implement would allow this to occur.
> >
> Environments are different *on purpose*, what environments do cannot
> be achieved using any other 'standard' object. And it's exactly
> environment's behavior on assign that makes it useful, so what you
> are proposing is basically making it into a list (so that it gets
> copied on assign), which makes no sense. What you really want is
> something other than an environment, but you insist on using an
> environment - it's like insisting on using a screwdriver on a nail -
> it's not the screwdriver's fault that it doesn't work ...
> .. and since you pounding on OO - environments are the closest you
> can get to an object semantics as implemented in the most popular OO
> languages, so I wonder why you aren't arguing to make all objects
> into references ;).
> Cheers,
> Simon

I don't think ad hominem arguments and unsupported statements that things "make no sense" or analogies to screwdrivers have any relevance to this discussion. I think by this time I have shown that subclassing of environments does not work yet it could if it were designed differently and furthermore there are significant problems with the workarounds. mailing list Received on Thu Jul 06 05:38:33 2006

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