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On 5/24/2012 10:18 PM, Emeka wrote:
> I would need example,that is use case before the below would sink.
> *__mode* - Control weak references. A string value with one or both
> of the characters 'k' and 'v' which specifies that the the *k*eys
> and/or *v*alues in the table are weak references.

The first link that Google has gives a detailed explanation. A few links later on that Google search is a very simple example:

Google is your friend. :)