Is it possible to extend multiple components with one component? Is so, how?
Technically yes, but no. ;)
In CF (and JAVA), there is only single inheritance. However, with CF, you can add methods to the /WEB-INF/cftags/component.cfc and all your application CFCs will inherit from it as well as any super class you may specify in your CFC (think java.lang.Object, which all JAVA classes automatically inherit from).
However, as has been discussed on this list, it is not a good practice to do this, and probably doesn't make sense to do based on what I think you're trying to do. Ray Camden (I believe) has said that he'll put debugging methods in that CFC in development, but that's really the only good use of this trick that I've read as yet.
Regards, Dave.
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