[Newbies] Re: reading lines from textfiles on Linux

[Charles D Hixson]

Klaus D. Witzel wrote:
> Hi Charles,
>
> on Tue, 16 May 2006 00:13:51 +0200, you <charleshixsn at earthlink.net>
> wrote:
>
>> I'm having a lot of trouble trying to read in one line of text on a
>> Linux system.
>
> This is normal, Squeak likes apples more than anything else :-D
>
> Have a look at the implementor of #concreteStream. I often implant
> CrLfFileStream there.
>
> BTW: what release / image / platform are you using? CrLfFileStream
> should be O.K. for reading *nix files, I do that day-in-day-out.
>
> /Klaus
3.8-6665-full
0 updates available
>
>> the commands:
>> | fil lin |
>> fil    :=    CrLfFileStream new.
>> fil open: 'aising/data/technologies.csv' forWrite: False.
>> Transcript cr; show: (fil).
>> fil    ascii.
>> Transcript cr; show: 'LineEndConvention = '; show: fil
>> lineEndConvention.
>> fil reopen.
>> lin    :=    fil nextLine.
>> Transcript cr; show: 'lin 1 = '; show: lin.
>>
>> Fail at the attempt to reopen.  (Or, alternatively, either an attempt to
>> "fil position: 0" or "fil position: 1".
>> If I don't test the line end convention, the entire file is read into
>> the first line.  If I do the test, the result is that the protocol is
>> "lf" (which seems the right answer).  If I open the file in a standard
>> text editor, it looks correct, and has 43 lines + an empty 44th line
>> (that I believe is created in th editor).
>>
>> I at first tried to copy the example from the "cookbook" exactly:
>> file := FileStream fileNamed: 'test.txt'.
>> [file atEnd] whileFalse:
>> [line := file nextLine. "Process the line"]
>>
>> (well, I used StandardFileStream rather than FileStream, and I changed
>> the file opening to
>> tmpFile    :=    StandardFileStream open: 'aising/data/technologies.csv'
>> forWrite: False.
>>     [tmpFile atEnd]    whileFalse:
>>         [    temp    :=    tmpFile nextLine.
>>
>> When everything in the file ended up read into the first line, I started
>> trying alternates...so far without success.
>>
>> Any suggestions?  I'd try using the code without modifications, but my
>> image doesn't appear to *have* a FileStream class.