Accessing object B properties outisde of object A's getter method

Question

gareth 2012-4-3

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/34427-accessing-object-b-properties-outisde-of-object-a-s-getter-method

I am trying to implement an object with dependent properties and therefore have a getter method to dynamically access these properties. However, I am having trouble with implementation once the properties are dependent on properties of objects outside of the particular class. EX

classdef objA

properties (Dependent)

propA

end

methods

    propA = get.propA(objA)
    propA = objA.propA * propB.value;

end

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Answer 1

Alex Taylor 2012-4-3

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https://ww2.mathworks.cn/matlabcentral/answers/34427-accessing-object-b-properties-outisde-of-object-a-s-getter-method#answer_43164

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Sounds like your class objA should define a property that holds the object(s) you need to define your get operation.

classdef objA
properties (Dependent)
     propA
     propB
end
methods
      propA = get.propA(objA)
      propA = objA.propA * propB.value;
  end

http://en.wikipedia.org/wiki/Object_composition

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gareth 2012-4-3

Thank you for the response. I had previously considered your suggestion however, what if propB is truly a property of some other uniquely different class. Ex: if objA.propA = tire.weight & objB.propB = door.weight. ( This is probably a bad example compared to the early given code)

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