Equalise the number of files with windows batch - windows

Question

I have a script that is designed to count the number of files with a value in the filename (****_1.jpg), compare it with the number of files with another name (****_2.jpg) and delete the larger number of files so the number of files are equal for each type.
This is what I've got so far
#echo off
setlocal enableextensions
set count1=0
set count2=0
for %%f in (.\seq\*_1.jpg) do set /a count1+=1
echo "1 " %count1%
for %%f in (.\seq\*_2.jpg) do set /a count2+=1
echo "2 " %count2%
if %count1% gtr %count2% (
set /a count=%count2%-%count1%
for /l %%A in (1,1,%count%) do echo "%count2% + %%A _1.jpg"
)
if %count2% gtr %count1% (
set /a count=%count2%-%count1%
for /l %%A in (1,1,%count%) do echo "%count1% + %%A _2.jpg"
)
endlocal
I can get the counts, I make it to my if statements and then nothing happens. What am I missing?
For now I'm trying to echo a list of files I'm about to delete.

Answer 1

In addition to the need for ENABLEDELAYEDEXPANSION, there really is no record of file names from either set. The "count" cannot be used to create the filename, can it?
I put in some code at the top to create a test set. Always referencing THEDIR obviates the need to hardcode a directory name in many places.
When you think it will work, remove echo from the DEL command line.
#echo off
setlocal enableextensions enabledelayedexpansion
set "THEDIR=.\seqtest"
if not exist "%THEDIR%" (mkdir "%THEDIR%")
for /l %%i in (1, 1, 5) do (echo %%i >"%THEDIR%\file_%%i_1.jpg")
for /l %%i in (1, 1, 7) do (echo %%i >"%THEDIR%\file_%%i_2.jpg")
set count1=0
set count2=0
for %%f in ("%THEDIR%\*_1.jpg") do set /a count1+=1
echo "1 " %count1%
for %%f in ("%THEDIR%\*_2.jpg") do set /a count2+=1
echo "2 " %count2%
if %count1% gtr %count2% (
set /a count=%count2%-%count1%
set /a "dcount=0"
for /f "usebackq tokens=*" %%f in (`dir /b "%THEDIR%\*_1.jpg"`) do (
echo DEL "%%~f"
set /a "dcount+=1"
if !dcount! EQU !count! (goto Outa2)
)
for /l %%A in (1,1,%count%) do echo "%count2% + %%A _1.jpg"
)
if %count2% gtr %count1% (
set /a count=%count2%-%count1%
set /a "dcount=0"
for /f "usebackq tokens=*" %%f in (`dir /b "%THEDIR%\*_2.jpg"`) do (
echo DEL "%%~f"
set /a "dcount+=1"
if !dcount! EQU !count! (goto Outa2)
)
)
:Outa2
:TheEnd
exit /b 0
If you want to delete any _1 file that does not exist as an _2 file and vice versa, you could loop over the _1 files and delete any for which no _2 file exists. Then, loop over the _2 files and delete any for which no _1 file exists.
for /f "usebackq tokens=*" %%f in (`dir /b "%THEDIR%\*_1.jpg"`) DO (
set "FN=%%~f"
set "BASE=!FN:~0,-6!"
if not exist "%THEDIR%\!BASE!_2.jpg" (echo DEL "%THEDIR%\!BASE!_1.jpg")
)
for /f "usebackq tokens=*" %%f in (`dir /b "%THEDIR%\*_2.jpg"`) DO (
set "FN=%%~f"
set "BASE=!FN:~0,-6!"
if not exist "%THEDIR%\!BASE!_1.jpg" (echo DEL "%THEDIR%\!BASE!_2.jpg")
)

Answer 2

As I understand this problem, you have two lists of files and you want to delete files from the larger list so both lists have the same number of files. Right? For example:
1_1.jpg 1_2.jpg
2_1.jpg 2_2.jpg
3_1.jpg 3_2.jpg
4_2.jpg
5_2.jpg
In previous example you want to delete 4_2.jpg and 5_2.jpg, correct? If the first list is the larger one, the files must be deleted from it; if both lists have the same number of files, no files be deleted. This solution do that:
#echo off
setlocal
rem Enter to the folder with files
cd seq
rem Get the first list of files
dir /B *_1.jpg > first.txt
rem Merge the first list...
< first.txt (
rem ... with the second list
for %%f in (*_2.jpg) (
rem For each file in second list, read a file from first list
set "first=" & set /P "first="
if not defined first ( rem The second list is larger: cut it
ECHO del "%%f"
)
)
rem If still are files in first list, it is larger: cut it
for /F "delims=" %%f in ('findstr "^"') do ECHO del "%%f"
)

Answer 3

I think, Your method for searching for all *.jpg files is little buggy. You should try this following approach instead. I've modified the code to check the code a little - but you'll get the idea.
#echo off
setlocal EnableDelayedExpansion enableextensions
set count1=0
set count2=0
for /f %%f in ('Dir /s /b "Photo\*.jpg"') do set /a count1+=1
echo "1 " %count1%
for /f %%f in ('Dir /s /b "Photo\*.Png"') do set /a count2+=1
echo "2 " %count2%
if %count1% gtr %count2% (
set /a count=%count2%-%count1%
for /l %%A in (1,1,%count%) do echo "!count2! + %%A _1.jpg"
)
if %count2% gtr %count1% (
set /a count=%count2%-%count1%
for /l %%A in (1,1,%count%) do echo "!count1! + %%A _2.jpg"
)
endlocal
pause >nul
You can change the searching path from - "Photo\*.jpg" to anything in both cases. And this one has given me desired result on the CMD. I Hope this will work fine for you.

Answer 4

...
echo "2 " %count2%
set /a count=count1-count2
set "count=%count:-=%"
if %count1% gtr %count2% (
...
You evidently want to calculate count and need a method to find its absolute value.
simply subtract one vale from the other, then replace any - in the result with nothing.
From the prompt, see set /? for documentation.