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Thanks for your advice. I'll have a try.

Best regards,
Wei


2010/11/25 Sean Luke <[log in to unmask]>

> On Nov 24, 2010, at 9:20 PM, Wei He wrote:
>
>  In the STGP example of the manual, the val variable can store both boolean
>> and real-valued data. However, in my case, the input from the child (char
>> data) and the the result (Bike data) of a GPNode can not use the same val
>> variable. Should I allocate different fields for them as below?
>>
>> public class MyData extends GPData {
>>         public char char_val;
>>         public Bike Bike_val;
>>         public GPData copyTo(GPData other) {
>>                   ((MyData)other).char_val = char_val;
>>                   ((MyData)other).Bike_val = Bike_val;
>>                   return other;
>>         }
>> }
>>
>
> Sure, that's how I'd do it.  However I would clone Bike_val rather than
> sharing the pointer.  Also you'll need to implement the MyData.clone()
> method and in it clone the Bike.  I should show that as an example in the
> manual.
>
> Now it may be the case that you have certain GPNodes which can accept
> EITHER a char or a Bike.  In that case I would have an additional boolean
> which indicates which variable holds the real data.
>
> Sean
>