Identifying a class type - bad practice?

greg greg at
Thu Aug 20 02:51:36 CEST 2009

James Harris wrote:
> I don't know yet whether it will be
> easier to modify the tree or to create a new one for each phase.

You can create a new tree using this style as
well. Just have each method create and return a
new node instead of modifying the existing one.


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