On 23 Feb 2014, at 8:30 pm, [email protected] wrote:

> Therefore the encoded class of the numeric key is essential.


Another solution would be just to use a string, with some encoding scheme of 
your own device, e.g. append a type code to the constant. Category methods on 
NSString would allow you to create these easily and extract the original value 
as its original type. It might be more reliable than bending NSNumber in a 
similar fashion. Just a thought.

--Graham





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