Hi Robert, Clemens Hintze <c.hintze / gmx.net> wrote in <m3ae95pfgu.fsf / qiao.localnet>: <<SNIP>> take \cle's comments and add this... Smalltalk lacks: - modules - mix-in's Ruby lacks: - "nice" class (refactoring-)browser - advanced Meta model (Behavior class). Parsing classes make use of this. Coming from Smalltalk, the "not to mention worth 'Ruby lacks'-list" is one of the main reasons why I love Ruby. Regards the *other* Clemens ;-)