Apparently terminology.

Also, it appears that Avi's Singleton's package isn't available
anymore (the link on Squeak Map points to the beta4.com site that has
been taken over by one of those search engines that sit on domain
names.

I went to go look in more detail.

I knew eToys did prototype or instance based programming, but never
new how. I also didn't know there was a concept called UniClasses. I'm
fairly well read on Squeak (been on the list since 96-97), reviewed
Guzdial's blue book, read his white book, Steph's robot book, and I'm
working through SBE.

I've recently been hearing a lot about singleton methods from Ruby, so
that's why I chimed in.

Thanks for the redirect. Will start learning more about UniClasses!
On 9/19/07, Bert Freudenberg <bert at freudenbergs.de> wrote:
> In Squeak this is usually called "uniclasses" (for Unique Class) as a
> way to add methods to instances. It's in the base system - send
> #assureUniClass to the instance.
>
> What's the difference of this to #becomeSingleton?
>
> - Bert -
>
> On Sep 19, 2007, at 3:50 , David Mitchell wrote:
>
> > Nope. Not about the GoF Singleton pattern at all.
> >
> > More like Ruby singleton methods. Which is about an instance or
> > instances that have methods that aren't defined in the class for all
> > objects.
> >
> > http://map.squeak.org/accountbyid/04ec7571-cb7e-47ea-
> > b1fc-218f7ec45adc/package/9d63f342-30e3-4db2-8695-3d65ccf28100
> >
> > "This package adds the #becomeSingleton method to Object, which will
> > transform the receiver into an instance of a new, anonymous subclass
> > of its original class. This lets you add or redefine methods on an
> > object-by-object basis."
> >
> > On 9/18/07, Brad Fuller <bradallenfuller at yahoo.com> wrote:
> >> On Tue September 18 2007, Chris Muller wrote:
> >>> Avi's "Singletons" package might be what you're looking for..
> >>
> >> Hmm... Is that anything like the Singleton pattern of having only
> >> one instance
> >> of a class? That's not what I'm looking for. I want many instances.
> >>
> >>>
> >>> On 9/18/07, Brad Fuller <bradallenfuller at yahoo.com> wrote:
> >>>> Is there a way to override an instance method w/o subclassing?
> >>>> For instance, class Morph has a method that returns true, but I
> >>>> want the
> >>>> that
> >>>> method to return false when instancing some types of Morphs and
> >>>> others
> >>>> not. (there is no setter/getter for this method.) Is there a way
> >>>> to do
> >>>> that w/o adding a setter/getter to Morph or subclassing the
> >>>> different
> >>>> Morphs?
> >>
> >>
> >>
> >>
> >
>
>
>
>
>
>