[Tutor] lists, name semantics

[boB Stepp]

On Sun, Apr 19, 2015 at 4:05 PM, Dave Angel <davea at davea.name> wrote:
> On 04/19/2015 03:08 PM, boB Stepp wrote:
>>

>> Or is the real point that we are adding an abstraction
>> layer so we don't even have to think about where objects are
>> physically stored in RAM?
>
>
> Somebody keeps track, but the address is not necessarily constant, and not
> necessarily stored in any references.  The references (bindings) are
> abstract, and the details are unimportant to the user.  For example, the
> jython system does not use addresses at all.  And an object gets moved
> around from time to time without its references knowing it.

The last sentence in this paragraph has me intrigued. Why would an
object, once it has been created, be moved? What practical benefit
does doing this give?

boB