Re: Question about collections

• To: info-dylan@ai.mit.edu
• Subject: Re: Question about collections
• From: neelk@brick.cswv.com (Neel Krishnaswami)
• Date: Fri, 25 Feb 2000 20:15:01 -0500 (EST)
• References: <slrn8bbq2c.co0.neelk@brick.cswv.com> <wkln49sz01.fsf@double.co.nz> <Pine.GSO.3.96.1000225112248.21306A-100000@tardis.tardis.ed.ac.uk>
• Reply-To: neelk@alum.mit.edu
• Xref: traf.lcs.mit.edu comp.lang.dylan:11578

Hugh Greene <q@tardis.ed.ac.uk> wrote:
> On Thu, 24 Feb 2000, Chris Double wrote:
> > neelk@brick.cswv.com (Neel Krishnaswami) writes:
> > >
> > > Does stretchiness mean that size can change without losing object
> > > identity, or is it something else? I'm guessing the latter from the
> > > fact that <list> isn't a <stretchy-collection>, but I'm honestly not
> > > sure.
> > 
> > Chapter 8 (Collections) of the DRM describes <mutable-collection> and
> > <stretchy-collection> as:
> > 
> >   "Instances of <mutable-collection> can have their elements changed
> >   after they are created. Instances of <stretchy-collection> can have
> >   keys added and removed after they are created."
> 
> In particular, these things have to be able to happen while preserving
> object identity.  

Thanks. So my class should be a subclass of plain old <sequence>. This
is what I did originally, and then I started to have doubts. :)


Neel

• Question about collections
• From: neelk@brick.cswv.com (Neel Krishnaswami)
• Re: Question about collections
• From: Chris Double <chris@double.co.nz>
• Re: Question about collections
• From: Hugh Greene <q@tardis.ed.ac.uk>

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