some Racket-y (102); arrows and renaming for define-struct in teaching languages; need to find and run lang tests
some Racket-y (102); arrows and renaming for define-struct in teaching languages; need to find and run lang tests

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket