Okay I have several lines in a text file. I want to get the first line and save it in another file. For example this is the text file:
put returns between paragraphs
for linebreak add 2 spaces at end
for linebreak add 2 spaces at end2
for linebreak add 2 spaces at end3
I want put returns between paragraphs to be saved into another file.
I used
for /f "tokens=" %%A in ('findstr /r "^[0-9][0-9]*$" <"C:\Users\Sherlock\Desktop\AbcImport\123.txt"') do echo 123>>1234.txt
pause
But it doesn't work at all.
How to get just the first line of a text file written into a new text file using a batch file?
Option 1 - SET /P : This is the simplest and fastest pure batch solution, provided the line does not exceed 1021 bytes, and it does not end with control characters that must be preserved. The size of the file does not matter - it will always read and write the first line very quickly.
#echo off
setlocal enableDelayedExpansion
set "ln="
<"input.txt" set /p "ln="
>"output.txt" (echo(!ln!)
Option 2 - FOR /F : This will work with lines up to ~8191 bytes long, but it can be slow if the file is really large because the FOR /F loop must read the entire file before it processes the first line. This solution is basically the same as the Mofi answer, except it disables the EOL option, so it never ignores the first line, regardless what the first character is. It does have a limitation that it will skip empty lines, so technically it does not give the correct result if the first line is empty:
#echo off
for /f usebackq^ delims^=^ eol^= %%A in ("input.txt") do echo(%%A>"output.txt"&goto :break
:break
There is a way to preserve the first line if it is empty using pure batch, but I would not bother. I would move on to ...
Option 3 - JREPL.BAT, or some other non-batch solution : Batch is quite poor at manipulating text files. You are much better off using some other scripting language like VBScript, JScript, or Powershell. Or a Windows port of any number of unix utilities.
I would use JREPL.BAT - a hybrid JScrpit/batch regular expression text processing utility that runs natively on any Windows machine from XP onward. It is way overkill for such a simple task, but it is an extremely handy, powerful, and efficient tool to have in your arsenal. Once you have it, then it can be used for many text processing tasks. Full documentation is embedded within the script.
jrepl "^.*" "$&" /jendln "quit=true" /f "input.txt" /o "output.txt"
Use CALL JREPL if you put the command within a batch script.
Here is the batch code to write just first non blank/empty line of a text file into another text file.
#echo off
for /F "usebackq delims=" %%I in ("InputTextFile.txt") do (
echo %%I>"OutputTextFile.txt"
goto ContinueAfterLoop
)
:ContinueAfterLoop
InputTextFile.txt is the file in current directory containing the first line to copy.
OutputTextFile.txt is the file created in current directory with first line from input file copied into this output file.
The command GOTO is used to exit the loop after first line is processed and continue the batch file below the loop.
For understanding the used commands and how they work, open a command prompt window, execute there the following commands, and read entirely all help pages displayed for each command very carefully.
echo /?
for /?
goto /?
Read also the Microsoft article about Using Command Redirection Operators.
You can use use this command:
SetLocal EnableDelayedExpansion
for /f "tokens=* delims=;" %%m in ("C:\Users\Sherlock\Desktop\AbcImport\123.txt") do (
set /p FirstLine=<%%m
echo !FirstLine!>>1234.txt
)
and for multiple file:
SetLocal EnableDelayedExpansion
for %%a in ("*") do (
for /f "tokens=* delims=;" %%m in ("%%a") do (
set /p FirstLine=<%%m
echo !FirstLine!>>1234.txt
)
)
rem Get the first line of a text file:
set /P "line=" < "C:\Users\Sherlock\Desktop\AbcImport\123.txt"
rem Write it into a new text file:
echo %line%> 1234.txt
I am trying to create a batch file that will edit a .csv and remove the first column, and any summary lines contained in the file. I am, however, fairly new to programming batch files, so I am not sure the best way to start this, and it would be great if you could include a basic explanation of how the code works so I can be self-sustaining in the future!
,Type,Date,Num,Name,Memo,Member,Clr,Split,Alias,Value,Balance
ABB - Egypt,,,,,,,,,,,
ElAin EL-Sokhna,,,,,,,,,,,
,Invoice,09-06-10,12005,ABB - EL-Sokhna,,Accounts Receivable,,Training Income,15000,,15000
,Invoice,09-14-11,12005,ABB - EL-Sokhna,“ElAin EL-Sokhna“ Trainer for OTS Application: First two weeks,Training Income,,Accounts,,150001,0
Total ElAin EL-Sokhna,,,,,,,,,241194,210400,301794
ABB - Egypt - Other,,,,,,,,,,,
There are various iterations of this file, as they come from a monthly report, I need to remove the first (empty) column, and any rows that look like ABB - Egypt,,,,,,,,,,, or Total ElAin EL-Sokhna,,,,,,,,,241194,210400,301794
So the output should be:
Type,Date,Num,Name,Memo,Member,Clr,Split,Alias,Value,Balance
Invoice,09-06-10,12005,ABB - EL-Sokhna,,Accounts,,Training Income,15000,,15000
Invoice,09-14-11,13002,ABB - EL-Sokhna,“ElAin EL-Sokhna“ Trainer for OTS Application: First two weeks,Training Income,,Accounts,,150001,0
Thanks for the input!
EDIT: It seems I wasn't clear enough in my OP (Sorry, first time here).
There are two processes that need to happen here, in every file the first column must be deleted, and any lines that are either title lines ABB - Egypt,,,,,,,,,,, or summary lines Total ElAin EL-Sokhna,,,,,,,,,241194,210400,301794 need to be removed.
All lines that need to be kept will be mostly filled in, such as ,Type,Date,Num,Name,Memo,Member,Clr,Split,Alias,Value,Balance or ,Invoice,09-06-10,12005,ABB - EL-Sokhna,,Accounts Receivable,,Training Income,15000,,15000 Notice that, as in the second line, it is possible for there to be some missing values in them, so doing a search for something like ",," will not work.
Batch is a terrible language for modifying text files. There are a great many special cases that require arcane knowledge to work around the problem. You may have a script that seems to do what you want, and then some wrinkle appears in your data, and the entire script may have to be redesigned.
With regard to your specific problem, it appears to me that you only want to preserve rows that begin with a comma, meaning the first column is empty. Of those remaining rows, you want to remove the first (empty) column.
Assuming none of the rows you want to keep have an empty value for the second column, then there is a really trivial solution:
#echo off
>"%~1.new" (for /f "delims=, tokens=*" %%A in ('findstr "^," %1') do echo %%A)
move /y "%~1.new" %1 >nul
The script expects the file to be passed as the first and only argument. So if your script is named "fixCSV.bat", and the file to be modified is "c:\test\file.csv", then you would use:
fixCSV "c:\test\file.csv"
The %1 expands to the value of the first argument, and %~1 is the same, except it also strips any enclosing quotes that may or may not be present.
The FINDSTR command reads the file and writes out only lines that begin with a comma. The FOR /F command iterates each line of output. The "delims=, tokens=*" options effectively strip all leading commas from each line, and the result is in variable %%A, which is then ECHOed. The entire construct is enclosed in parentheses and stdout is redirected to a temporary file. Finally, the temporary file is moved over top of the original file, thus replacing it.
If the 2nd column may be empty, then the result will be corrupted because it removes all leading commas (both columns 1 and 2 in this case). The script must be more complicated to compensate. You would need to set a variable and then use delayed expansion to get the sub-string, skipping the first character. But delayed expansion will corrupt expansion of the %%A variable if it contains the ! character. So delayed expansion must be toggled on and off. You are beginning to see what I mean by lots of special cases.
#echo off
setlocal disableDelayedExpansion
>"%~1.new" (
for /f "delims=" %%A in ('findstr "^," %1') do (
set "ln=%%A"
setlocal enableDelayedExpansion
echo !ln:~1!
endlocal
)
)
move /y "%~1.new" %1 >nul
As the batch scripts become more complicated, they become slower and slower. It may not be an issue for most files, but if the file is really large (say hundreds of megabytes) then it can become an issue.
I almost never use pure batch to modify text files anymore. Instead, I use a hybrid JScript/batch utility that I wrote called JREPL.BAT. The utility is pure script that runs natively on any Windows machine from XP onward. JREPL.BAT is able to efficiently modify text files using regular expression replacement. Regular expressions can appear to be mysterious, but they are well worth the investment in learning.
Assuming you have JREPL.BAT somewhere within your PATH, then the following command is all that you would need:
jrepl "^,(.*)" "$1" /jmatch /f "yourFile.csv" /o -
The /F option specifies the file to read.
The /O option with value of - specifies that the output should replace the original file.
The /JMATCH option specifies that each replacement value is written out to a new line. All other text is dropped.
The first argument is the search expression. It matches any line that begins with a comma, and everything after that is captured in a variable named $1.
The second argument specifies the replacement value, which is simply the captured value in variable $1.
A way will be to define all your rules in a variable which will be used against
findstr. The rules must be defined like this :
/c:"String which exclude the line" /c:"Another string which exclude the Line" /c: "etc.."
This rules must be exact (That they can't be found in a line who must stay).
For the empty first colonne you can use a substitution the way i made it in the code with
,Type=Type
,Invoice=Invoice
Test.bat :
#echo off&cls
setlocal enabledelayedexpansion
Rem The rules
set $String_To_Search=/c:"ABB - Egypt," /c:"Total ElAin El-Sokhna," /c:"ElAin EL-Sokhna," /c:"ABB - Egypt - Other,"
for /f "delims=" %%a in (test.csv) do (
set $line=%%a
Rem the substitutions for the first Column
set $Line=!$Line:,Type=Type!
set $line=!$Line:,Invoice=Invoice!
Rem the test and the ouput if nothing was found
echo !$Line! | findstr /i %$String_To_Search% >nul || echo !$Line!
))>Output.csv
I used a file test.csv for my test.
The ouput is redirected to Output.csv
Perhaps is this what you want?
#echo off
setlocal EnableDelayedExpansion
for /F "delims=" %%a in (input.csv) do (
set "line=%%a"
if "!line:~0,1!" equ "," echo !line:~1!
)
When a problem is not enough explained we can only guess the missing details. In this case, I assumed that you just want the lines that start with comma, deleting it. The output is the same as your output example...
EDIT: Output example added
Type,Date,Num,Name,Memo,Member,Clr,Split,Alias,Value,Balance
Invoice,09-06-10,12005,ABB - EL-Sokhna,,Accounts Receivable,,Training Income,15000,,15000
Invoice,09-14-11,12005,ABB - EL-Sokhna,“ElAin EL-Sokhna“ Trainer for OTS Application: First two weeks,Training Income,,Accounts,,150001,0
I would start here to learn this: How can you find and replace text in a file using the Windows command-line environment?
It covers many details of substitution from Windows command line and many ways to do it, some requiring only what's built into Windows, and some requiring other downloadable software.
Magoo is right, more criteria is needed, but there might be enough information in the linked page for you to get past the main hurdles.
#ECHO OFF
SETLOCAL
(FOR /f "tokens=*delims=," %%a IN ('findstr /b /l "," q28079306.txt') DO ECHO %%a)>newfile.txt
GOTO :EOF
I used a file named q28079306.txt containing your data for my testing.
Produces newfile.txt
This question already has answers here:
Set output of a command as a variable (with pipes) [duplicate]
(6 answers)
Closed 7 years ago.
I need to run a simple find command and redirect the output to a variable in a Windows Batch File.
I have tried this:
set file=ls|find ".txt"
echo %file%
But it does not work.
If I run this command it works without problems:
set file=test.txt
echo %file%
So obviously my command output is not being set to my variable. Can anyone help? Thanks
I just find out how to use commands with pipes in it, here's my command (that extracts the head revision of an svn repo) :
SET SVN_INFO_CMD=svn info http://mySvnRepo/MyProjects
FOR /f "tokens=1 delims=" %%i IN ('%SVN_INFO_CMD% ^| find "Revision"') DO echo %%i
First of all, what you seem to expect from your question isn't even possible in UNIX shells. How should the shell know that ls|find foo is a command and test.txt is not? What to execute here? That's why UNIX shells have the backtick for such things. Anyway, I digress.
You can't set environment variables to multi-line strings from the shell. So we now have a problem because the output of ls wouldn't quite fit.
What you really want here, though, is a list of all text files, right? Depending on what you need it's very easy to do. The main part in all of these examples is the for loop, iterating over a set of files.
If you just need to do an action for every text file:
for %%i in (*.txt) do echo Doing something with "%%i"
This even works for file names with spaces and it won't erroneously catch files that just have a .txt in the middle of their name, such as foo.txt.bar. Just to point out that your approach isn't as pretty as you'd like it to be.
Anyway, if you want a list of files you can use a little trick to create arrays, or something like that:
setlocal enabledelayedexpansion
set N=0
for %%i in (*.txt) do (
set Files[!N!]=%%i
set /a N+=1
)
After this you will have a number of environment variables, named Files[0], Files[1], etc. each one containing a single file name. You can loop over that with
for /l %%x in (1,1,%N%) do echo.!Files[%%x]!
(Note that we output a superfluous new line here, we could remove that but takes one more line of code :-))
Then you can build a really long line of file names, if you wish. You might recognize the pattern:
setlocal enabledelayedexpansion
set Files=
for %%i in (*.txt) do set Files=!Files! "%%i"
Now we have a really long line with file names. Use it for whatever you wish. This is sometimes handy for passing a bunch of files to another program.
Keep in mind though, that the maximum line length for batch files is around 8190 characters. So that puts a limit on the number of things you can have in a single line. And yes, enumerating a whole bunch of files in a single line might overflow here.
Back to the original point, that batch files have no way of capturing a command output. Others have noted it before. You can use for /f for this purpose:
for /f %%i in ('dir /b') do ...
This will iterate over the lines returned by the command, tokenizing them along the way. Not quite as handy maybe as backticks but close enough and sufficient for most puposes.
By default the tokens are broken up at whitespace, so if you got a file name "Foo bar" then suddenly you would have only "Foo" in %%i and "bar" in %%j. It can be confusing and such things are the main reason why you don't ever want to use for /f just to get a file listing.
You can also use backticks instead of apostrophes if that clashes with some program arguments:
for /f "usebackq" %%i in (`echo I can write 'apostrophes'`) do ...
Note that this also tokenizes. There are some more options you can give. They are detailed in the help for command.
set command has /p option that tells it to read a value from standard input. Unfortunately, it does not support piping into it, but it supports reading a value from a first line of existing file.
So, to set your variable to the name of a first *.txt file, you could do the following:
dir /b *.txt > filename.tmp
set /p file=< filename.tmp
del /q filename.tmp
It is important not to add a space before or even after =.
P. S. No fors, no tokens.
Here's a batch file which will return the last item output by find:
#echo off
ls | find ".txt" > %temp%\temp.txt
for /f %%i in (%temp%\temp.txt) do set file=%%i
del %temp%\temp.txt
echo %file%
for has a syntax for parsing command output, for /f "usebackq", but it cannot handle pipes in the command, so I've redirected output to a temporary location.
I strongly recommend, given that you have access to ls, that you consider using a better batch language, such as bash or even an scripting language like python or ruby. Even bash would be a 20x improvement over cmd scripting.
The short answer is: Don't!
A windows shell env var can hold a max of 32 Kb and it isn't safe to save output from programs in them.
That's why you can't. In batch script you must adopt another programming style. If you need all of the output
from the program then save it to file. If you only need to check for certain properties then pipe the output into
a program that does the checking and use the errorlevel mechanism:
#echo off
type somefile.txt | find "somestring" >nul
if %errorlevel% EQU 1 echo Sorry, not found!
REM Alternatively:
if errorlevel 1 echo Sorry, not found!
However, it's more elegant to use the logical operators Perl style:
#echo off
(type somefile.txt | find "somestring" >nul) || echo Sorry, not found!
It's not available in DOS, but in the Windows console, there is the for command. Just type 'help for' at a command prompt to see all of the options. To set a single variable you can use this:
for /f %%i in ('find .txt') do set file=%%i
Note this will only work for the first line returned from 'find .txt' because windows only expands variable once by default. You'll have to enable delayed expansion as shown here.
what you are essentially doing is listing out .txt files. With that, you can use a for loop to over dir cmd
eg
for /f "tokens=*" %%i in ('dir /b *.txt') do set file=%%i
or if you prefer using your ls, there's no need to pipe to find.
for /f "tokens=*" %%i in ('ls *.txt') do set file=%%i
Example of setting a variable from command output:
FOR /F "usebackq" %%Z IN ( `C:\cygwin\bin\cygpath "C:\scripts\sample.sh"` ) DO SET BASH_SCRIPT=%%Z
c:\cygwin\bin\bash -c '. ~/.bashrc ; %BASH_SCRIPT%'
Also, note that if you want to test out the FOR command in a DOS shell, then you need only use %Z instead of %%Z, otherwise it will complain with the following error:
%%Z was unexpected at this time.