Pass data to an instance of a class outside the constructor

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Anon 2012-7-11

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Dear all,

I am currently working on a class that is associated with various methods. One of the methods (function) produces some additional data associated with the instance of the class. This data should be available if I call the function with the same instance again, but it should not be available (since it eats memory) if I have never called that function. Can anybody give a hint, how I could pass this data to the instance without that it was generated in the constructor?

Hope I made myself clear. I am still new to OOP and not too familiar with the terminology.

Best regards, Anon

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回答（1 个）

Sean de Wolski 2012-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/43393-pass-data-to-an-instance-of-a-class-outside-the-constructor#answer_53265

在 MATLAB Online 中打开

obj = object_of_some_class(pi,exp(1));
obj.some_property = that_value;  %set that other property here

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Sean de Wolski 2012-7-13

Then make it a handle class! This is exactly the reason for handle classes, i.e: you pass the handle to the object around and allow other functions to modify it via its handle.

Anon 2012-7-13

I see, there is still a lot to learn. A quick reading of the difference of handle and value classes reveals that handle classes might be an elegant solution to my problem. Thanks for your help!

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