Le 12/01/2023 à 15:35, Juan Vuletich a écrit : > Yes. UnicodeStrings can not be modified (they are effectively > immutable), so #shallowCopy and #copy just answer the receiver. We'd > need to update the CuisBook. Ok then. I see now there are several places in the book to update. -- GNU Dr. Geo http://drgeo.eu http://blog.drgeo.eu