2016-12-18 19:43 GMT+01:00 Юрий Мироненко <assargad...@gmail.com>:
> Sorry, I'm not sure I fully understand your idea. > It looks like trying to make another implementation of UndefinedObject, is > it? > > What is the main difference between proposed MissingValue and > UndefinedObject? MissingValue you will set up according to your business logic. While nil is just default value of variable which could be in your object by some incident, bug of application.