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Rewrite the first three characters of *.ext file names in a folder with a set of letters

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0

How to rewrite the first 3 letters of file name

• Using set alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 to randomise characters


• Targeting all files of a particular extension in a folder *.ext


• Duplication of 3 characters by chance does not matter (46,656 variables already)


• Batch script solution to run in a windows environment.


• Prefer script to be simple to reduce run time.

Suggested code and breakdown. Note: I still have no idea how to code.

• 
  

  Original:

  
  
  

  032_name.ext
  
  039_name.ext
  
  0D8_name.ext
  
  333_other.txt
  
  

  
  


• 
  

  Write Over the top of first three characters

  
  
  

  XXX-name.ext
  
  

  
  


• 
  

  After

  
  
  

  D7K_name.ext
  
  L2V_name.ext
  
  720_name.ext
  
  333_other.txt
  
  

  
  

Make batch file (SetRename.bat or SetRename.cmd) then run command like:

SetRename %r *.ext   /or/ SetRename %r3%name% *.ext  /or/ SetRename

• 
  

  Code 1 adapted from DavidPostill, example of full solution

  
  
  

  @echo off
  
  setlocal enabledelayedexpansion
  
  rem initialise counter
  
  set "alphabet=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
  
  rem process jpg and png files
  
  for /f "usebackq tokens=*" %%i in (`dir /b *.ext *.ex2`) do (
  
    rem split into name and extension
  
    set _name=[reduce 3 characters]]%%~ni
  
    set _ext=%%~xi
  
    rem do the rename
  
    ren "%%i" "!y!-!_name!-!_ext!"
  
    increment counter
  
    set /alphabet "%Random%"
  
    )
  
  endlocal
  
  

  
  


• 
  

  Code 2 adaptated from 3 SU posts

  
  
  

  @echo off
  
  
  
  setlocal enableextensions enabledelayedexpansion
  
  
  
  set "alphabet=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
  
  
  
  for %%a in (%alphabet%) do (
  
      set "a.!name!=%%a"
  
  set o=-%3 [reduce by 3] 
  
  
  
  )   
  
  set "y="
  
  for /l %%a in (1 1 3) do (
  
      set /a "r=!random!"
  
      for %%b do set "y=!-%3!!r!!name!"
  
  )
  
  echo(%y%
  
  
  
  endlocal
  
  

  
  

Current Research:

• SU File rename with suffix as 01 02 03 04 etc (and Further Reading)


• SU How do I isolate filename and extension from %1?


• SU Rename files by command line


• SU Rename Files Random Batch File


• SU - How do I remove the same part of a file name


• SU Command Prompt Rename Prefix


• 
  Stack Overflow on Random Strings: Link 1 Link 2 Link 3


• ss64 - Random Syntax


• ss64 - REN Rename Command


• wikibooks - Windows Programming/Programming CMD


• Informit - Windows Batch Files


• techguy - Random Numbers and Letters

windows-10 command-line file-extension batch-rename prefix

share|improve this question

edited 9 mins ago

phuclv

9,99164093

asked 28 mins ago

Kass MonkKass Monk

186

add a comment | 

0

How to rewrite the first 3 letters of file name

• Using set alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 to randomise characters


• Targeting all files of a particular extension in a folder *.ext


• Duplication of 3 characters by chance does not matter (46,656 variables already)


• Batch script solution to run in a windows environment.


• Prefer script to be simple to reduce run time.

Suggested code and breakdown. Note: I still have no idea how to code.

• 
  

  Original:

  
  
  

  032_name.ext
  
  039_name.ext
  
  0D8_name.ext
  
  333_other.txt
  
  

  
  


• 
  

  Write Over the top of first three characters

  
  
  

  XXX-name.ext
  
  

  
  


• 
  

  After

  
  
  

  D7K_name.ext
  
  L2V_name.ext
  
  720_name.ext
  
  333_other.txt
  
  

  
  

Make batch file (SetRename.bat or SetRename.cmd) then run command like:

SetRename %r *.ext   /or/ SetRename %r3%name% *.ext  /or/ SetRename

• 
  

  Code 1 adapted from DavidPostill, example of full solution

  
  
  

  @echo off
  
  setlocal enabledelayedexpansion
  
  rem initialise counter
  
  set "alphabet=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
  
  rem process jpg and png files
  
  for /f "usebackq tokens=*" %%i in (`dir /b *.ext *.ex2`) do (
  
    rem split into name and extension
  
    set _name=[reduce 3 characters]]%%~ni
  
    set _ext=%%~xi
  
    rem do the rename
  
    ren "%%i" "!y!-!_name!-!_ext!"
  
    increment counter
  
    set /alphabet "%Random%"
  
    )
  
  endlocal
  
  

  
  


• 
  

  Code 2 adaptated from 3 SU posts

  
  
  

  @echo off
  
  
  
  setlocal enableextensions enabledelayedexpansion
  
  
  
  set "alphabet=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
  
  
  
  for %%a in (%alphabet%) do (
  
      set "a.!name!=%%a"
  
  set o=-%3 [reduce by 3] 
  
  
  
  )   
  
  set "y="
  
  for /l %%a in (1 1 3) do (
  
      set /a "r=!random!"
  
      for %%b do set "y=!-%3!!r!!name!"
  
  )
  
  echo(%y%
  
  
  
  endlocal
  
  

  
  

Current Research:

• SU File rename with suffix as 01 02 03 04 etc (and Further Reading)


• SU How do I isolate filename and extension from %1?


• SU Rename files by command line


• SU Rename Files Random Batch File


• SU - How do I remove the same part of a file name


• SU Command Prompt Rename Prefix


• 
  Stack Overflow on Random Strings: Link 1 Link 2 Link 3


• ss64 - Random Syntax


• ss64 - REN Rename Command


• wikibooks - Windows Programming/Programming CMD


• Informit - Windows Batch Files


• techguy - Random Numbers and Letters

windows-10 command-line file-extension batch-rename prefix

share|improve this question

edited 9 mins ago

phuclv

9,99164093

asked 28 mins ago

Kass MonkKass Monk

186

add a comment | 

How to rewrite the first 3 letters of file name

• Using set alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 to randomise characters


• Targeting all files of a particular extension in a folder *.ext


• Duplication of 3 characters by chance does not matter (46,656 variables already)


• Batch script solution to run in a windows environment.


• Prefer script to be simple to reduce run time.

Suggested code and breakdown. Note: I still have no idea how to code.

• 
  

  Original:

  
  
  

  032_name.ext
  
  039_name.ext
  
  0D8_name.ext
  
  333_other.txt
  
  

  
  


• 
  

  Write Over the top of first three characters

  
  
  

  XXX-name.ext
  
  

  
  


• 
  

  After

  
  
  

  D7K_name.ext
  
  L2V_name.ext
  
  720_name.ext
  
  333_other.txt
  
  

  
  

Make batch file (SetRename.bat or SetRename.cmd) then run command like:

SetRename %r *.ext   /or/ SetRename %r3%name% *.ext  /or/ SetRename

• 
  

  Code 1 adapted from DavidPostill, example of full solution

  
  
  

  @echo off
  
  setlocal enabledelayedexpansion
  
  rem initialise counter
  
  set "alphabet=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
  
  rem process jpg and png files
  
  for /f "usebackq tokens=*" %%i in (`dir /b *.ext *.ex2`) do (
  
    rem split into name and extension
  
    set _name=[reduce 3 characters]]%%~ni
  
    set _ext=%%~xi
  
    rem do the rename
  
    ren "%%i" "!y!-!_name!-!_ext!"
  
    increment counter
  
    set /alphabet "%Random%"
  
    )
  
  endlocal
  
  

  
  


• 
  

  Code 2 adaptated from 3 SU posts

  
  
  

  @echo off
  
  
  
  setlocal enableextensions enabledelayedexpansion
  
  
  
  set "alphabet=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9"
  
  
  
  for %%a in (%alphabet%) do (
  
      set "a.!name!=%%a"
  
  set o=-%3 [reduce by 3] 
  
  
  
  )   
  
  set "y="
  
  for /l %%a in (1 1 3) do (
  
      set /a "r=!random!"
  
      for %%b do set "y=!-%3!!r!!name!"
  
  )
  
  echo(%y%
  
  
  
  endlocal
  
  

  
  

Current Research:

• SU File rename with suffix as 01 02 03 04 etc (and Further Reading)


• SU How do I isolate filename and extension from %1?


• SU Rename files by command line


• SU Rename Files Random Batch File


• SU - How do I remove the same part of a file name


• SU Command Prompt Rename Prefix


• 
  Stack Overflow on Random Strings: Link 1 Link 2 Link 3


• ss64 - Random Syntax


• ss64 - REN Rename Command


• wikibooks - Windows Programming/Programming CMD


• Informit - Windows Batch Files


• techguy - Random Numbers and Letters

windows-10 command-line file-extension batch-rename prefix

share|improve this question

edited 9 mins ago

phuclv

9,99164093

asked 28 mins ago

Kass MonkKass Monk

186

SetRename %r *.ext   /or/ SetRename %r3%name% *.ext  /or/ SetRename

share|improve this question

edited 9 mins ago

phuclv

9,99164093

asked 28 mins ago

Kass MonkKass Monk

186

share|improve this question

edited 9 mins ago

phuclv

9,99164093

asked 28 mins ago

Kass MonkKass Monk

186

edited 9 mins ago

phuclv

9,99164093

edited 9 mins ago

phuclv

9,99164093

asked 28 mins ago

Kass MonkKass Monk

186

asked 28 mins ago

Kass MonkKass Monk

186