When I run this program on my mac, I get the output that Quico
predicts (i.e., the two return the same thing and there is no
terminating empty list).
#lang racket
(require 2htdp/batch-io)
(parameterize ([current-input-port
(open-input-string
"first line\n\nthird line\n")])
(read-words/line 'stdin))
(parameterize ([current-input-port
(open-input-string
"first line\n\nthird line")])
(read-words/line 'stdin))
Robby
On Sat, Apr 16, 2016 at 9:32 AM, Matthias Felleisen
<matth...@ccs.neu.edu> wrote:
>
> I cannot reproduce this behavior on my Mac 10.11. After reading the code of
> the library, I also don’t see why Linux should behave differently. The
> file’s history also doesn’t show a problem report concerning this issue. —
> Matthias
>
>
>
>
>> On Apr 15, 2016, at 9:39 PM, Quico Jurado <quico.jur...@gmail.com> wrote:
>>
>> Hello, I posted this question in SO, but hoping to get more answers here.
>>
>> I'm reading Part two from the 2htdp book, and I'm curious about the behavior
>> of the read-words/line function that lives under 2htdp/batch-io.
>>
>> I created two different files, the first file having a \n at the end of the
>> file and the second file without it, like this:
>>
>> echo -ne "first line\n\nthird line\n" > file1.txt
>> echo -ne "first line\n\nthird line" > file2.txt
>>
>> if I read each one of the files with the read-words/line, this is the result:
>>
>> (read-words/line "doc/book/htdp2/data/file1.txt")
>> ; => '(("first" "line") () ("third" "line"))
>>
>> (read-words/line "doc/book/htdp2/data/file2.txt")
>> ; => '(("first" "line") () ("third" "line"))
>>
>> It looks that the function isn't preserving the information from the last
>> newline character in the first file.
>>
>> Is that behavior intended?
>>
>> I'm Running Dr Racket 6.2.1 on a GNU/Linux box.
>>
>> Thanks,
>>
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