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...roblem with defining S3 methods for other S4 classes (namely, that S4 inheritance was not recognized) has been fixed, to the extent possible. See ?Methods (especially the section on S3 methods). For details (there are quite a few) see the paper referenced there, http://stat.stanford.edu/~jmc4/classInheritance.pdf Since these changes arguably fix design flaws, I would like to see them in 2.9.1, so please test them out. For the moment, they are only in the r-devel version. There can be changes to current behavior. For example, I found one regression test for S4 methods that only worked because...

...ent or revision, rather than having users encounter ambiguous method selection later on. In that spirit, ambiguous method selection is no longer a warning, just a message. The new mechanism for class ordering and method selection is described in a draft paper at http://stat.stanford.edu/~jmc4/classInheritance.pdf (later likely to be part of a submission to the R Journal). John

Hello Everyone, I am working on a control collection for javascript/Ajax.Net. I am stuck on the class inheritance aspects of the prototype library. If someone could point me to an example it would be a great help. I have looked through the controls.js of the scriptaculous library and found something like the below code, but everytime I ran it I would get a constructor error. Thanks for any help;