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What do you use to store missing value state in Core Data? Former I used NSString and stored numbers as string i.e. @”10.25″. And I always converted it before any numeric calculations. And the missing value was just set with @””. But I move forward, and want to choose a primitive Numeric type to store, I can’t indicate, that the value is missing. Do you have any idea?
I have added an ’empty’ attribute to the entry, its type is BOOL, and I just modified the logic in the code.