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POShould I have two different variables in one class that represent almost the same thing
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  1. POShould I have two different variables in one class that represent almost the same thing
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    copied!<p>At first I had a class A that took a list B as constructor argument. This list B was kept within class A in a variable. Another class that used this class A needed the data in list B, but in a different way. So I created a specific object C and had a getSomething() method in class A that on the fly created one of these object C, based on information in the original list B. This worked fine.</p> <p>Then it turned out that the class that called getSomething() needed a little bit extra information that the original list B did not contain. A small calculation on the specific elements in list B however gave me that information. That information needed to be added to the object C. This calculation is a bit heavy so I do not want to do it on the fly when I create object C in getSomething(). This gave me a problem since I cannot update any elements of object C with this calculated information, since the elements of object C do not exist yet, they are created in getSomething().</p> <p>How should I solve this the best way. Are there perhaps any patterns?</p> <ul> <li><p>Do I in the constructor of class A convert the elements in list B to a list of object C and then discard list B, and then perform the calculation and updates all elements of object C?</p></li> <li><p>Do I keep both the original list B and a list of object C and have two variables with almost the same information, just presented in a different way?</p></li> <li><p>Or something else?</p></li> </ul> <p>Edit: C is not an extension of an element in list B, its more that one or more elements in list B is combined to a C.</p>
 

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