Generate a list of the newest file in each subdirectory in windows batch -

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i have need determine newest file in each subdirectory under root folder , output list text file showing both filename , creation date. example, if root directory d:\data contains total of 4 subdirectories, , 1 of 4 contain subdirectory, output file should contain list of files (not including created folders) this:

d:\data\folder1\filename 02/12/14

d:\data\folder2\filename 03/02/14

d:\data\folder3\filename 03/15/14

d:\data\folder4\folder01\filename 01/22/14

i have checked other posts, none seem specifically...

two options

@echo off     setlocal enableextensions enabledelayedexpansion      set "rootfolder=c:\somewhere"  :: option 1     echo --------------------------------------------------------------------------------     /d /r "%rootfolder%" %%a in (.) (         set "first="         /f "delims=" %%b in ('dir /o-d /a-d /b "%%~fa\*" 2^>nul') if not defined first (             set "first=1"             %%c in ("%%~fa\%%b") echo %%~tc %%~fc         )     )  :: option 2     echo --------------------------------------------------------------------------------     set "tempfile=%temp%\%~nx0.%random%.tmp"     dir /a-d /b /s /o-d "%rootfolder%" 2>nul >"%tempfile%"      set "oldfolder="     /f "usebackq delims=" %%a in ("%tempfile%") if not "%%~dpa"=="!oldfolder!" (         echo %%~ta %%~fa         set "oldfolder=%%~dpa"     )      del /q "%tempfile%" >nul 2>nul

option 1 recurse on folders structure , each one, dir command executed retrieve list of files in folder in descending date order. first in list rececent one.

option 2 use 1 dir command retrieve full list of files in descending date order , save retrieved information in temporary file. file processed. each time name of folder changes, output first line recent file in folder.

option 1 start earlier echo information, multiple commands used, require more time execute, needs less memory retrieve file list of 1 folder each time.

option 2 uses less commands , faster, uses temporary file , requires more memory option 1 full file list loaded in memory.

select depending of how deep folder structure, how files have, how memory, .... test.


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