There is gls package https://github.com/Kalimehtar/gls/tree/master
It is even more generic (you may use any predicate as a `type') Your case is #lang racket (require gls) (defgeneric dup) (add-method dup (method ((a string?)) (string-append a a))) (add-method dup (method ((a exact-integer?)) (list a a))) For more CL-like approach (with defmethod, type-of and so on) you may use `swindle' (package or language). Wed, 02 Apr 2014 20:53:58 +0200 от Alejandro Zamora Fonseca <ter...@ltu.sld.cu>: >Hello everybody! > >I have a newbie question. > >¿How can I create generic-functions in Racket? > >Something like >this samples in CL: > >(defmethod dup ((a string)) > (concatenate 'string a a)) > >(defmethod dup ((a integer)) > (list a a)) > >Cheers, > > Alejandro > > >-- > >Este mensaje le ha llegado mediante el servicio de correo electronico que >ofrece Infomed para respaldar el cumplimiento de las misiones del Sistema >Nacional de Salud. La persona que envia este correo asume el compromiso de >usar el servicio a tales fines y cumplir con las regulaciones establecidas > >Infomed: http://www.sld.cu/ > >____________________ > Racket Users list: > http://lists.racket-lang.org/users > -- Roman Klochkov
____________________ Racket Users list: http://lists.racket-lang.org/users
