William Tanksley William.Tanksley at p98.f112.n480.z2.fidonet.org
Fri Jul 2 12:58:37 EDT 1999

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From: wtanksle at dolphin.openprojects.net (William Tanksley)

On Fri, 02 Jul 1999 22:10:46 +1000, Gary Stephenson wrote:

>> There is probably something in the the FAQ.  BAsically, tuples are stored
>> more compactly and can be used as dictionary keys (because they ARE
>> readonly).

>How similar are Python's "Immutable Tuples" to Eiffel's "Expanded
>objects".  If one was to try to implement immutable tuples in another
>language, would an "expanded objects" implementation be the best, or even
>appropriate?

No similarity.  Expanded objects are objects which are handled by value
rather than reference.  Immutable types (which include tuples) are types
whose dimensions cannot change.

An instance of an immutable type may be created in expanded form.

>gary

-- 
-William "Billy" Tanksley

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