> > > (ReadStream on: #(1 2 3 4 5) from: 3 to: 3) size
>
> On last thing and I'll let this go for now (which I already 
> said I would do and then didn't) what does an answer of 3 in
> this example mean?

There is no good equivalent in the current collection hierarchy to model
this as the above is actually an optimized version of, e.g.,

	subset := #(1 2 3 4 5) copyFrom: 1 to: 3.
	rs := ReadStream on: subset.
	rs position: 3.

The best we can probably get to is by introducing a #truncate: operation
which truncates the actual number of elements of some stream/collection. So
the above is really equivalent to:

	rs := ReadStream on: #(1 2 3 4 5).
	rs truncate: 3.
	rs position: 3.

with the following assertions:

	self assert: (rs size = 3).
	self assert: (rs isEmpty not).
	self assert: (rs atEnd).
	self assert: (rs next == nil).


Cheers,
  - Andreas