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saving and loading objects

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Patrick Mboma
Patrick Mboma 2013-8-20
关闭： MATLAB Answer Bot 2021-8-20
Dear all, This, I guess, would be a simple question to most of you but it is not obvious to me. I have been developing a class for a while and the most recent version of the code cannot load the objects constructed using earlier versions. What should I do in this case? How to implement a class that does not have problems of backward compatibility, especially in the presence of hidden, private and protected attributes? How to safeguard against attributes name changes, etc.? Is it a good or a bad thing to have an object whose properties could be instances of objects of a totally different class?
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Patrick Mboma
Patrick Mboma 2013-8-21
I do not have any experience with addprop, but I have looked it up and it looks interesting. What I meant was much simpler: you have an object of class, say, class1 and then one of its properties is an object of, say, class2.
per isakson
per isakson 2013-8-22
编辑：per isakson 2013-8-22
" Is it a good or a bad thing to have an object whose properties could be instances of objects of a totally different class?" It is good; it is the way to implement aggregation and composition. One cannot do without it.
"How to implement a class that does not have problems of backward compatibility" I wouldn't even try; I think that would impose too large restrictions on the design.

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