From: Ralph Shnelvar Date: 2012-02-21T01:30:36+09:00 Subject: Re: Metaprograming question about initialize Monday, February 20, 2012, 3:39:57 AM, you wrote: BD> You can use the Struct class, which implements exactly this. BD> -- Matma Rex Bartosz, What I want to do is not change the interface but the implementation. That is, I want to get a list of the names of the arguments by introspection. Ralph