in reply to Re^2: Abusing Exporter for Conditional Inheritance
in thread Abusing Exporter for Conditional Inheritance

A class factory can be a way to hand back the same class with different initialization parameters. The point is to hide the initialization stuff behind a simple call.

In the case you describe here, if the code calling this thing knows which one it wants, I think you should actually either just make the two classes and call them or make a class that has some kind of method like "set_collection_color()" for switching the behavior.

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Re^4: Abusing Exporter for Conditional Inheritance
by mojotoad (Monsignor) on Mar 17, 2005 at 19:13 UTC
    Yet the only difference between the two cases is the contents of @ISA. And localizing @ISA is probably not a good idea. Last night tye pointed out that it's probably not thread safe, and look here for an explanation from gbarr as to why it's not efficient.

    Matt

[reply]
      Yet the only difference between the two cases is the contents of @ISA

      Yes, and? Why look for a complex and likely to fail solution when you have a simple and certain to work one?

[reply]
        With all due respect, perrin, the factory solution strikes me as more complex. I am willing to consider it, however, but I still don't understand how you can accomplish it without localizing @ISA. Unless I'm missing something obvious?

        Thanks,
        Matt

[reply]

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