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Tom Phoeni
#1 / 9
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 read last line without reading previous lines, how?
Quote: > I wonder how to reading the last line of a text file, without going
> through the previous lines.
This FAQ entry has some info about that. Hope this helps! http://www.*-*-*.com/
How_do_I_change_one_line_in_a_fi.html
--
Tom Phoenix http://www.*-*-*.com/ ~rootbeer/
Randal Schwartz Case: http://www.*-*-*.com/
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| Sun, 02 Jan 2000 03:00:00 GMT |
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Chuan Wa
#2 / 9
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read last line without reading previous lines, how? Hi,
I wonder how to reading the last line of a text file, without going through
the previous lines. Thanks.
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| Sun, 02 Jan 2000 03:00:00 GMT |
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Helmut Jaraus
#3 / 9
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read last line without reading previous lines, how?
|> Hi,
|>
|> I wonder how to reading the last line of a text file, without going through
|> the previous lines. Thanks.
Look up the man pages for 'seek', there is a mode to seek to the end of a file.
--
Helmut Jarausch
Lehrstuhl f. Numerische Mathematik
Institute of Technology, RWTH Aachen
D 52056 Aachen, Germany
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| Tue, 04 Jan 2000 03:00:00 GMT |
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Jeff Wilso
#4 / 9
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read last line without reading previous lines, how? Try ...
--
Jeff Wilson
London - UK
Quote: Wang) writes:
: |> Hi, : |> : |> I wonder how to reading the last line of a text file, without going through : |> the previous lines. Thanks. : : Look up the man pages for 'seek', there is a mode to seek to the end of a file. : -- : Helmut Jarausch : Lehrstuhl f. Numerische Mathematik : Institute of Technology, RWTH Aachen : D 52056 Aachen, Germany :
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| Sun, 09 Jan 2000 03:00:00 GMT |
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Tom Phoeni
#5 / 9
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read last line without reading previous lines, how?
Quote: > Subject: Re: read last line without reading previous lines, how? > Try ...
> open(TXT,"<textfile");
That doesn't read the last line without reading previous lines. You should
should be referenced as $fred[-1] . Thanks for trying! --
Tom Phoenix http://www.teleport.com/~rootbeer/
Randal Schwartz Case: http://www.rahul.net/jeffrey/ovs/
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| Sun, 09 Jan 2000 03:00:00 GMT |
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Scott Blankstee
#6 / 9
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read last line without reading previous lines, how? Quote:
> Try ...
> open(TXT,"<textfile");
Don't forget to check the return value of open...
But this reads *all* the lines in textfile...
Quote:
> : |> I wonder how to reading the last line of a text file, without
> going through
> : |> the previous lines. Thanks.
Scott --
Scott I. Blanks{*filter*}
sib (at) worldnet (dot) att (dot) net
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| Sun, 09 Jan 2000 03:00:00 GMT |
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Bob Wilkins
#7 / 9
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read last line without reading previous lines, how?
Quote:
Wang) writes: > |> Hi, > |> > |> I wonder how to reading the last line of a text file, without going through > |> the previous lines. Thanks. > Look up the man pages for 'seek', there is a mode to seek to the end of
a file.
> --
> Helmut Jarausch
> Lehrstuhl f. Numerische Mathematik
> Institute of Technology, RWTH Aachen
> D 52056 Aachen, Germany
or use system "tail","-1",$file; #?or some such variant
Bob
--
.sig file on holiday
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| Sun, 09 Jan 2000 03:00:00 GMT |
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x..
#8 / 9
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read last line without reading previous lines, how?
Quote:
>> open(TXT,"<textfile");
>Don't forget to check the return value of open...
>But this reads *all* the lines in textfile...
>> : |> I wonder how to reading the last line of a text file, without
>> going through
>> : |> the previous lines. Thanks.
The only method which is system independant would be to fseek() to the end of the file, and then iterate back one byte at a time until you hit a newline- you could even build the line as you go (backwards, of course).
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| Mon, 10 Jan 2000 03:00:00 GMT |
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Mark A Johnso
#9 / 9
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read last line without reading previous lines, how? a similar question is: "how can i read a file from last line to
first?" i'm probably looking for a pre-written function that doesn't
store the entire file in an array, and it doesn't step through the
entire file for each line.
thanks.
Quote:
> Try ... > open(TXT,"<textfile");
> --
> Jeff Wilson
> London - UK
> (Chuan
> Wang) writes:
> : |> Hi,
> : |>
> : |> I wonder how to reading the last line of a text file, without
> going through
> : |> the previous lines. Thanks.
> :
> : Look up the man pages for 'seek', there is a mode to seek to the end
> of a file.
> : --
> : Helmut Jarausch
> : Lehrstuhl f. Numerische Mathematik
> : Institute of Technology, RWTH Aachen
> : D 52056 Aachen, Germany
> :
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| Tue, 11 Jan 2000 03:00:00 GMT |
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