On Thu, Mar 29, 2012 at 11:15 AM, Roelof Wobben <r.wob...@home.nl> wrote: > Op 29-3-2012 16:37, David Van Horn schreef: > >> ;; Posn -> Number. >> ;; A programm for calculating the distance is Manhatten >> (check-expect (manhatten (make-posn 7 3 )) 10) >> (check-expect (manhatten (make-posn 1 1 )) 2) >> >> (define (manhatten pos-manhatten) >> (+ (posn-y pos-manhatten) (posn-x pos-manhatten)))
One trick I use to let the DrRacket editor help me out is use newlines and its knowledge of indentation. If you put a newline after the first argument to manhatten, the DrRacket editor will have the second argument line up right below the first. If the indentation that the editor uses doesn't match my expectations, then I know something strange has happened. ____________________ Racket Users list: http://lists.racket-lang.org/users
