中国DOS联盟

Originally posted by 无奈何 at 2006-11-7 11:09:
I'll also add one for sed, but the file shouldn't be too huge.

sed -re :a -e "N;$!ba;s/(*)\n(.*)\n(.*)/\3\n\2\n\1/"

Sed download: http://www.student.northpark.edu/pemente/s ...

The moderator's sed usage is not understandable, I'll copy it back and check the information first

@echo off

setlocal ENABLEDELAYEDEXPANSION

    set file=a.txt

    for /f "delims=: tokens=1,*" %%i in ('findstr /n .* "%file%"') do set "%%i=%%j" & set num=%%i

    set "str=!%~1!"

    set "%~1=!%~2!"

    set "%~2=%str%"

    for /l %%i in (1,1,%num%) do if defined %%i (echo.!%%i!) else echo.

pause

@echo off

setlocal ENABLEDELAYEDEXPANSION

    set file=a.txt

    for /f "delims=: tokens=1,*" %%i in ('findstr /n .* "%file%"') do set "%%i=%%j" & set num=%%i

    set "str=!%~1!"

    set "%~1=!%~2!"

    set "%~2=%str%"

    for /l %%i in (1,1,%num%) do if defined %%i (echo.!%%i!) else echo.

pause

Using the above principle, it's not difficult to implement 3, -3.
I was writing the above thing when a friend called me to help with the system. I don't know if there are bugs, but the principle is just those.

The method that the moderator let the line numbers directly simulate array variables is really clever~:)
It's so enjoyable to be able to see such interesting content~:)

I'm wondering if the code of moderator 3742668 will be executed when encountering | in the line. I tried and it seems not possible

I'm wondering if the code of moderator 3742668 will execute when encountering | in the line ~ I tried and it seems not possible

Any parameters added?
It tests normally here.

There's no help for it that the code of the moderator is concise and neat when dealing with small texts;
The code of vkill will go wrong when there is no carriage return (newline) character in the last line of the text;
I'll also post my code, based on sed

@echo off
sed -n "$!d;G;P" a.txt> temp.txt
sed "1d;$d" a.txt>> temp.txt
sed q a.txt>> temp.txt
type temp.txt
pause

It works no matter whether there is a carriage return (newline) character in the last line of the text or not

Last edited by amao on 2007-2-2 at 05:18 PM ]

It's really not easy to be able to write the requirements like this

Originally posted by amao at 2007-2-2 16:33:
There is no help for it, the moderator's code is concise and neat when solving small texts;
vkill's code will have an error when there is no carriage return (newline) character in the last line of the text;
I will also post my code, based on sed

@ech ...

Brother also likes sed? Hehe

Originally posted by vkill at 2007-2-3 05:06:

You also like sed? Hehe

I'm studying it hard

Bump up to ask. If I want to swap the lines containing "Zhang San" and "Xiao Er" according to the text content given by the LZ, how to handle it? I want to hear the processing method with sed :)