I find the following: (write (string->list #<<end a a end ))
In DrRacket (#\a #\newline #\a) In Racket: (#\a #return #\newline #\a #\return) Jos > -----Original Message----- > From: Robby Findler [mailto:ro...@eecs.northwestern.edu] > Sent: sábado, 21 de junio de 2014 8:29 > To: Jos Koot > Cc: Alexander D. Knauth; users > Subject: Re: [racket] newlines in strings not the same in > DrRacket and Racket > > I think that here strings are parsed in a way to make the > line-separator difference not matter too. Maybe that works best for > you? > > http://docs.racket-lang.org/reference/reader.html#%28idx._%28g entag._54._%28lib._scribblings%2Freference%2Freference..scrbl%> 29%29%29 > > Robby > > On Sat, Jun 21, 2014 at 1:25 AM, Jos Koot <jos.k...@gmail.com> wrote: > > Thanks Robby, that's clear. > > I often copy results from the interactions window to the > definitions window > > of DrRacket. > > After reverting my preference file to defaults and > reselecting my personal > > preferences, the problem has disappeared. > > Nevertheless I'll avoid the problem for the future. Four > options I think: > > 1: stick to your string-append advice. > > 2: @ notation of scribble (which I have to try out yet, but > may well be > > preferable) > > 3: replace all newlines in strings by \n (not nice for it > makes the text > > less readable) > > 4: my trick to remove #\return from strings before comparing them. > > Thanks, Jos > > > > > >> -----Original Message----- > >> From: Robby Findler [mailto:ro...@eecs.northwestern.edu] > >> Sent: sábado, 21 de junio de 2014 0:51 > >> To: Alexander D. Knauth > >> Cc: Jos Koot; users > >> Subject: Re: [racket] newlines in strings not the same in > >> DrRacket and Racket > >> > >> The issue is probably that the file is being saved with > CRLF. When the > >> file is opened in DrRacket, DrRacket always treats > newlines like that > >> as if there were the "\n" character. But when racket reads > the file it > >> just puts whatever bytes are in the saved file into the string. > >> > >> The best path forward: don't use actual newlines in literals (like > >> strings). Instead write things like: > >> > >> (string-append "first line\n" "second-line\n") > >> > >> Or use scribble's @ notation. > >> > >> Robby > >> > >> > >> On Fri, Jun 20, 2014 at 5:20 PM, Alexander D. Knauth > >> <alexan...@knauth.org> wrote: > >> > Or are you using different editors? Different editors > >> might use different > >> > conventions for representing newlines. > >> > > >> > When the 32 bit one has the problem, what does it say? > >> > > >> > For example when I made the text file with DrRacket or > >> TextEdit but ran it > >> > with racket (not DrRacket), it worked, > >> > but when I made the text file with Microsoft Word, it > gave me this: > >> > $ racket newline-3.txt > >> > (format "~n") = "\n" > >> > " > >> > " = "\r" > >> > Ran 1 check. > >> > 0 checks passed. > >> > Actual value > >> > , the expected value. > >> > In newline-3.txt at line 7 column 0 > >> > > >> > On Jun 20, 2014, at 5:14 PM, Jos Koot <jos.k...@gmail.com> wrote: > >> > > >> > Very strange. > >> > I did the same on my other computer and there it has the > >> same problem as > >> > before. > >> > I use windows 7 on both systems one with 64 bit OS and one > >> with 32 bit OS. > >> > The 64 bit version does well, the 32 bit windows 7 system > >> has the problem. > >> > May be my preferences? > >> > Thanks, Jos > >> > > >> > -----Original Message----- > >> > From: Jos Koot [mailto:jos.k...@gmail.com] > >> > Sent: viernes, 20 de junio de 2014 23:03 > >> > To: 'Alexander D. Knauth' > >> > Cc: 'users'; 'Jos Koot' > >> > Subject: RE: [racket] newlines in strings not the same in > >> > DrRacket and Racket > >> > > >> > Gives me > >> > > >> > (format "~n") = "\n" > >> > " > >> > " = "\n" > >> > The only test passed! > >> > > >> > both in DrRacket and Racket. > >> > Very surprising. Can you explain what happens here? > >> > I don't have a clue. > >> > Thanks, > >> > Jos > >> > > >> > > >> > ________________________________ > >> > > >> > From: Alexander D. Knauth [mailto:alexan...@knauth.org] > >> > Sent: viernes, 20 de junio de 2014 22:41 > >> > To: Jos Koot > >> > Cc: users > >> > Subject: Re: [racket] newlines in strings not the same > >> > in DrRacket and Racket > >> > > >> > > >> > This doesn't exactly solve your problem, but what > >> > happens (for both cases) when you do this?: > >> > #lang racket > >> > (require test-engine/racket-tests) > >> > (display "(format \"~n\") = ") (format "~n") > >> > (display "\"") (newline) > >> > (display "\" = ") " > >> > " > >> > (check-expect (format "~n") " > >> > ") > >> > (test) > >> > (void (read-line)) ; wait until the user has read the results. > >> > > >> > On Jun 20, 2014, at 3:02 PM, Jos Koot > >> > <jos.k...@gmail.com> wrote: > >> > > >> > > >> > Running the following in DrRacket goes well. > >> > > >> > #lang racket > >> > (require test-engine/racket-tests) > >> > (check-expect (format "~n") " > >> > ") > >> > (test) > >> > (read-line) ; wait until the user has read the results. > >> > > >> > Displays: The only test passed! > >> > > >> > But running the same with Racket tells me the > >> > test fails. > >> > I have a solution for this by removing #\return > >> > from the strings to be > >> > compared. > >> > > >> > Question though: Can I solve this problem in a > >> > simpler way? > >> > May be I overlooked something in the docs? > >> > > >> > Best wishes, Jos > >> > > >> > > >> > ____________________ > >> > Racket Users list: > >> > http://lists.racket-lang.org/users > >> > > >> > > >> > > >> > > >> > > >> > > >> > > >> > ____________________ > >> > Racket Users list: > >> > http://lists.racket-lang.org/users > >> > > > ____________________ Racket Users list: http://lists.racket-lang.org/users
