[racket] newlines in strings not the same in DrRacket and Racket

Ah, sorry.

Robby

On Sat, Jun 21, 2014 at 2:04 AM, Jos Koot <jos.koot at gmail.com> wrote:
>
> 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:robby at 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.koot at 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:robby at 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
>> >> <alexander at 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.koot at 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.koot at 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:alexander at 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.koot at 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
>> >> >
>> >
>