Rename xx to xx-1 Via Single Command Line

[Samir]

I know I've done this a hundred times using for, but I can't remember exactly how I did it. I can make the variable series of 01 to 10, but then decrementing that so the resulting command is 'ren 10 09' is what I don't recall.

Any help appreciated.

[Samir]

This produces a lot of errors, but does the job:

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FOR /L %F IN (10, 1, 29) DO FOR /L %G IN (9,1,28) DO REN %F %G

This is able to rename directories 10 to 29 to 9 to 28.

[aGerman]

Try something like that:

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@echo off &setlocal EnableDelayedExpansion
for /l %%i in (101 1 110) do (set /a "n1=%%i, n2=%%i-1" & ECHO ren !n1:~-2! !n2:~-2!)
PAUSE

Adapt it and remove ECHO and PAUSE.

Regards
aGerman

[Samir]

Try something like that:

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@echo off &setlocal EnableDelayedExpansion
for /l %%i in (101 1 110) do (set /a "n1=%%i, n2=%%i-1" & ECHO ren !n1:~-2! !n2:~-2!)
PAUSE

Adapt it and remove ECHO and PAUSE.

Regards
aGerman

Thank you! So without the echo and pause, would this execute directly from the command line? Or would something need to be set in the environment table for the delayed expansion?

[Squashman]

Not sure why you would want to type this at the cmd line but go nuts.

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cmd /v:on /C "for /l %i in (101 1 110) do (set /a "n1=%i, n2=%i-1" & ECHO ren !n1:~-2! !n2:~-2!)"

[Aacini]

This command-line rename directories 10 to 29 into 9 to 28:

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for /L %i in (9,1,29) do @(if defined j call ECHO ren %i %j%) ^& set j=%i

Just be sure to enter this command before:

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set "j="

Antonio

[off-topic]: Why "Squashman" is green?

[Squashman]

[off-topic]: Why "Squashman" is green?

Moderators have that option in their user control panel.

[Samir]

Not sure why you would want to type this at the cmd line but go nuts.

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cmd /v:on /C "for /l %i in (101 1 110) do (set /a "n1=%i, n2=%i-1" & ECHO ren !n1:~-2! !n2:~-2!)"

So I don't have to have a batch file just for the rename.

[Squashman]

Not sure why you would want to type this at the cmd line but go nuts.

Code: Select all

cmd /v:on /C "for /l %i in (101 1 110) do (set /a "n1=%i, n2=%i-1" & ECHO ren !n1:~-2! !n2:~-2!)"

So I don't have to have a batch file just for the rename.

So you are literally going to type this whole line in every time?
Because if you are just going to copy and paste it from a file then it might as well be a .BAT file.
This would be a total waste of time and resources in my world. If something can be automated or done quicker we do it no matter how trivial it is. We work with a limited staff and build full end to end automation for client data processing.

[foxidrive]

So you are literally going to type this whole line in every time?
Because if you are just going to copy and paste it from a file then it might as well be a .BAT file.

+1 That's exactly what batch files are good for - repeating tasks exactly the same way every time.

Samir, if you typo the command when typing it in then you have to undo the mess it creates. That's time wasted.

[Samir]

Not sure why you would want to type this at the cmd line but go nuts.

Code: Select all

cmd /v:on /C "for /l %i in (101 1 110) do (set /a "n1=%i, n2=%i-1" & ECHO ren !n1:~-2! !n2:~-2!)"

So I don't have to have a batch file just for the rename.

So you are literally going to type this whole line in every time?
Because if you are just going to copy and paste it from a file then it might as well be a .BAT file.
This would be a total waste of time and resources in my world. If something can be automated or done quicker we do it no matter how trivial it is. We work with a limited staff and build full end to end automation for client data processing.

+1 That's exactly what batch files are good for - repeating tasks exactly the same way every time.

Samir, if you typo the command when typing it in then you have to undo the mess it creates. That's time wasted.

I don't use it that often (maybe once every few years).

But when I do, I'd rather just use the code directly than to try to figure out what the parameters are to a batch file I created long ago. I always like to look at my commands and understand them unless I specifically made a batch file for a specific task that I don't have to worry about.