China DOS Union

Now there are two files a.txt and b.txt, and the contents are assumed as follows:

----a.txt----(This is a comment)
1
2
3
4
5
----end----(This is also a comment, the same below)

----b.txt----
1
b
3
4
5
6
----end----

How to generate through batch processing:

----a-b.txt----(Content that is in a but not in b)
2
----end----

----b-a.txt----(Content that is in b but not in a)
b
----end----

----a~b.txt----(Content that is in both a and b)
1
3
4
5
----end----

Asking all forum friends, is it possible to achieve such an effect with P processing? I know there is a fc command in the system that can compare text, but the generated result is not very intuitive.

Comparison is based on lines, and external commands can be used.

cd.>bh.txt
for /f "delims=" %%i in (a.txt) do SET %%i=A
for /f "delims=" %%j in (b.txt) do if /I not defined %%j echo %%j>>bh.txt

-------------------

cd.>bh.txt
for /f "delims=" %%i in (a.txt) do SET %%i=A
for /f "delims=" %%j in (b.txt) do if /I defined %%j echo %%j>>bh.txt

```
root@~ > grep -xvfb.txt a.txt
2

root@~ > grep -xvfa.txt b.txt
b

root@~ > grep -xfa.txt b.txt
1
3
4
5
6

root@~ >
```

Originally posted by lxmxn at 2009-11-26 03:13:

root@~ > grep -xvfb.txt a.txt

2



root@~ > grep -xvfa.txt b.txt

b



root@~ > grep -xfa.txt b.txt

1

3

4

5

6



root@~ >

Dude, this isn't a batch script??? Linux???

The person on the 2nd floor, you don't know how to use it?

Originally posted by ZJHJ at 2009-11-27 21:13:
You can't use it on the second floor.

,

Thank you for your reply, but may I ask, have you tried it and it worked?>>>???

Before testing, you need to download a grep.exe by yourself.

@echo off
cd.>a-b.txt
cd.>b-a.txt
cd.>a~b.txt
for /f "delims=" %%i in (a.txt) do (
findstr /i "%%i" b.txt > nul || echo %%i>>a-b.txt
)
for /f "delims=" %%i in (b.txt) do (
findstr /i "%%i" a.txt > nul || echo %%i>>b-a.txt
)
for /f "delims=" %%i in (a.txt) do (
findstr /i "%%i" b.txt > nul && echo %%i>>a~b.txt
)
pause

Originally posted by honcho at 2009-11-28 12:28:
@echo off
cd.>a-b.txt
cd.>b-a.txt
cd.>a~b.txt
for /f "delims=" %%i in (a.txt) do (
findstr /i "%%i" b.txt > nul || echo %%i>>a-b.txt
)
for /f "deli ...

Thanks. It works well.
Also, thanks to moderator lxmxn for the enthusiastic answer. The method you provided is also feasible.

Originally posted by junyee at 2009-11-27 23:21:
,

Thank you for your reply, but, may I ask, have you tried it and it worked?>>>???

You are really too much....... No way.....
setlocal EnableDelayedExpansion
cd.>1.txt
for /f "delims=" %%i in (b.txt) do SET %%i=A
for /f "delims=" %%j in (a.txt) do if /I not defined %%j echo %%j>>1.txt
endlocal EnableDelayedExpansion
cd.>2.txt
for /f "delims=" %%i in (a.txt) do SET %%i=A
for /f "delims=" %%j in (b.txt) do if /I not defined %%j echo %%j>>2.txt
setlocal
cd.>3.txt
for /f "delims=" %%i in (a.txt) do SET %%i=A
for /f "delims=" %%j in (b.txt) do if /I defined %%j echo %%j>>3.txt
Processing your file only takes 0.07 seconds
26.7 times faster than the code in post 8

[ Last edited by ZJHJ on 2009-11-28 at 22:01 ]

Originally posted by ZJHJ at 2009-11-28 21:30:


You're really too... no more...
setlocal EnableDelayedExpansion
cd.>1.txt
for /f "delims=" %%i in (b.txt) do SET %%i=A
for /f "delims=" %%j in (a.txt) do if ...

I quite agree, this method is extremely efficient.

Also: In line with the principle of simplicity and optimal efficiency,
the third environment does not need to be changed.
setlocal
cd.>1.txt
for /f "delims=" %%i in (b.txt) do SET %%i=A
for /f "delims=" %%j in (a.txt) do if /I not defined %%j echo %%j>>1.txt
endlocal
cd.>2.txt
cd.>3.txt
for /f "delims=" %%i in (a.txt) do SET %%i=A
for /f "delims=" %%j in (b.txt) do if /I not defined %%j (echo %%j>>2.txt) else (echo %%j>>3.txt)

Thanks to the诸位 upstairs.

The above three methods are all feasible.

findstr I can understand this, but the execution efficiency seems a bit low. It takes nearly 20 seconds to process a 10K text.

grep This requires a third-party program, and the text cannot be too large. When it reaches a few K, the program will report an error.

10/11Floor This is very magical, but I don't understand it. Can you help explain this usage??.

setlocal
...
endlocal


????

Why not use FC? FC is used to compare different ones~~ But I can't write it

I found a simplest code online.

Compare 1.txt and 2.txt, then output the result to text.txt.

Copy the content of the file to be compared into 1.txt.

Copy the content of another file with different content into 2.txt.

Save the following code as a *.bat file.

fc 1.txt 2.txt > text.txt

Then double-click the batch file to generate the text.txt file.

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