for /f "delims=" %%i in (test.txt) do if not defined %%i set %%i=a&echo %%i
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中国DOS联盟论坛 » DOS批处理 & 脚本技术（批处理室） » Please clarify the specific content or context of "删掉所有重复行" in the batch processing. Because there are different implementation methods for deleting different types of duplicate lines in different scenarios. For example, if it is a text file with lines of text, the general idea is to read line by line, store it in a temporary variable or array, and then judge whether it has been stored before. If not, it is written to a new file. But the specific batch code needs to be further determined according to the actual situation. Please provide more details.
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Floor 16
Posted 2007-04-21 07:37 · 中国 安徽 芜湖 电信
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Floor 17
Posted 2007-04-21 10:05 · 中国 广东 广州 天河区 电信
Floor 18
Posted 2007-04-21 10:52 · 中国 北京 宽捷网通信技术有限公司
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Floor 19
Posted 2007-09-26 14:20 · 中国 湖北 武汉 中国科学院武汉分院
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Originally posted by everest79 at 2007-4-21 04:41:
My this one can only delete the repeated lines
a
a
b
c
d
a
b
c
d
Cannot
a
a
b
c
d
b
c
d
src.txt is your original text, after execution, dst.txt is the filtered text. Switch the cmd to the directory where src.txt is saved, then execute the above line
Hahaha.... Finally found it
What I want is this
Give a thumbs up....
Floor 20
Posted 2007-09-26 22:22 · 中国 广东 东莞 电信
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The code on floor 16 doesn't work
D:\DOCUME~1\ADMINI~1>for /f "delims=" %i in (test.txt) do if not defined %i set %i=a&echo %i
D:\DOCUME~1\ADMINI~1>if not defined aa set aa=a & echo aa
D:\DOCUME~1\ADMINI~1>if not defined bb set bb=a & echo bb
D:\DOCUME~1\ADMINI~1>if not defined cc set cc=a & echo cc
D:\DOCUME~1\ADMINI~1>if not defined dd set dd=a & echo dd
D:\DOCUME~1\ADMINI~1>if not defined bb set bb=a & echo bb
D:\DOCUME~1\ADMINI~1>if not defined cc set cc=a & echo cc
D:\DOCUME~1\ADMINI~1>if not defined ee set ee=a & echo ee
D:\DOCUME~1\ADMINI~1>
D:\DOCUME~1\ADMINI~1>for /f "delims=" %i in (test.txt) do if not defined %i set %i=a&echo %i
D:\DOCUME~1\ADMINI~1>if not defined aa set aa=a & echo aa
D:\DOCUME~1\ADMINI~1>if not defined bb set bb=a & echo bb
D:\DOCUME~1\ADMINI~1>if not defined cc set cc=a & echo cc
D:\DOCUME~1\ADMINI~1>if not defined dd set dd=a & echo dd
D:\DOCUME~1\ADMINI~1>if not defined bb set bb=a & echo bb
D:\DOCUME~1\ADMINI~1>if not defined cc set cc=a & echo cc
D:\DOCUME~1\ADMINI~1>if not defined ee set ee=a & echo ee
D:\DOCUME~1\ADMINI~1>
Floor 21
Posted 2007-09-26 23:26 · 中国 北京 网联光通
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：:)
[ Last edited by yoyodos on 2007-9-26 at 11:28 PM ]
@echo off
setlocal enabledelayedexpansion
cd.>temp.txt
for /f "tokens=* delims=:" %%i in ('findstr /n ".*" test.txt') do (
echo %%i>>temp.txt
)
for /f "tokens=1* delims=:" %%m in (temp.txt) do (
for /f "tokens=1* delims=:" %%x in ('findstr /v /c:"%%m:" temp.txt') do (
if "%%n"=="%%y" (
set str=%%y !str!
)
)
)
findstr /v "!str!" test.txt
pause
[ Last edited by yoyodos on 2007-9-26 at 11:28 PM ]
Floor 22
Posted 2007-09-26 23:52 · 中国 江苏 常州 武进区 电信
Originally posted by chishingchan at 2007-9-26 22:22:
The code on floor 16 doesn't work
D:\DOCUME~1\ADMINI~1>for /f "delims=" %i in (test.txt) do if not defined %i set
%i=a&echo %i
D:\DOCUME~1\ADMINI~1>if not defined aa set aa=a & ech ...
The one on floor 16 should be okay!
@echo off
for /f "delims=" %%i in (test.txt) do if not defined %%i set %%i=a&echo %%i>>test2.txt
pause
Floor 23
Posted 2008-08-28 17:42 · 中国 上海 闵行区 电信
The sentence "set %%i=a" is used to set the variable represented by %%i to the value "a". In the context of this `for /f` loop, it's likely part of a process to initialize or assign a default value to each variable that is read from the `test.txt` file.
Floor 24
Posted 2008-08-28 18:05 · 中国 上海 闵行区 电信
Originally posted by bray at 2008-8-28 05:42 PM:
What is the use of `set %%i=a`?
Also, if you just want to delete adjacent duplicate lines, how to do it?
For example:
aaa
aaa
bbb
aaa
aaa
aaa
ccc
ddd
ccc
The desired result after processing is:
aaa
bbb
aaa
ccc
ddd
ccc
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