![]() ![]() ![]() Use the syntax below to edit and replace the characters assigned to a string Change the %F to %%F if you use the command within a batch script.How-to: Edit/Replace text within a Variable You can add the /i option if you want the search to ignore case. pushd "c:\your\path\with\files\to\be\modified"įor %F in (*.txt) do call jrepl "Cat" "Dog" /l /f "%F" /o. JREPL makes the solution so simple, it can easily be run directly on the command line, without any batch file. JREPL is pure script (hybrid JScript/batch) that runs natively on any Windows machine from XP onward. That is why I have abandoned using pure batch for text processing, and I developed JREPL.BAT to provide powerful regular expression text processing capabilities to the Windows command environment. Removing those limitations would require a ridiculous amount of slow and even more impenetrable code. Even after all the work, it still has the following limitations. The above required a lot of experience and arcane knowledge to develop. It is about as robust and efficient as pure batch can get if you want to use FOR /F to read the file. new extension to the original name, so "original.txt" becomes ""īelow is highly optimized code that addresses all but the first 4 points above. I prefer to have my temp file name to be a derivative of the original name. Best to minimize use of CALL if you want the fastest possible solution. The DEL/RENAME pair can be replaced by a single MOVE commandĬALL is relatively slow. ![]() Better (faster) to redirect once outside the loop. Redirection is performed for each line of output, which is slow. The only safe variant that is guaranteed to work is ECHO(.Ī non empty line could become empty after replacement if the replacement string is empty, and the empty line will not be output properly because neither ECHO. This can be simplified by getting the desired strings in environment variables (which may still require escape sequences) and then using delayed expansion and FOR /F to transfer the values to FOR variables. This can be avoided by transferring the search and replacement terms to FOR variables.Ĭertain characters within the search and/or replacement terms could cause problems or require complex escape sequences. The replacement will be corrupted if the search term contains %%a or %%b or %%A. Leading : will be stripped from all lines because consecutive delimiter characters are treated as a single delimiter. This can be solved by strategically toggling delayed expansion on and off within the loop(s). Lines containing ! will be corrupted because delayed expansion is enabled when %%A is expanded. The search string cannot contain = or begin with ~, * or ! Input and output lines must be a bit less than 8191 bytes long. ![]() SET modified=!string:%SEARCHTEXT%=%REPLACETEXT%!īut there are many limitations and inefficiencies with the code, with lots of room for improvement. Pushd "c:\path\to\your\folder\containing\files\to\modify"įor %%F in (*.txt) do call :replace "%%F"įor /f "tokens=1,* delims=¶" %%A in ( '"findstr /n ^^ %INTEXTFILE%"') do (įor /f "delims=: tokens=1,*" %%a in ("!string!") do set "string=%%b" Note - I eliminated dead (unused) variables from the code. This can be solved by using FOR /F with the DIR /B command instead. But if your code creates or renames folders, then a FOR loop could also process the newly created or renamed files. The end result of your code does not create or rename any folders, so a simple FOR is safe to use. This is a general approach that can be used for any code that you want to run iteratively If you want a pure batch solution, then the simplest thing to do is to encapsulate the code in a subroutine that takes the name of the file as an argument, and call that routine from within a FOR loop that iterates the file names. ![]()
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