Perfect!

BTW, in the comment at the top of ERC.java, it says:

"Remember that if your ERC value isn't a simple or mutable type (like  
an int or a string), you'll have to deep-clone it in an overridden  
clone() method."

Should that be "immutable"?

Peter Drake
http://www.lclark.edu/~drake/



On May 11, 2008, at 7:29 AM, Sean Luke wrote:

> It depends.  If you only have a small number of choices for  
> constant values, you could make different GPNode subclasses for  
> each class.
>
> If you have a large number of choices, you should create a subclass  
> ERC.java, which already does all the hard work for you.
>
> Sean
>
> On May 10, 2008, at 7:47 PM, Peter Drake wrote:
>
>> If I want to have various numeric constants as terminal nodes, I  
>> should define a class NumericConstant that extends GPNode, with  
>> each instance of this class able to hold a different value ... right?
>>
>> Apologies in advance for what will no doubt be a long series of  
>> foolish questions as I get my head around this system.
>>
>> Peter Drake
>> http://www.lclark.edu/~drake/
>>