Batch: Filter filename - batch-file

Question

I have lot file that need to filter before move to other folder.
The filter condition:
[PEQ]*_[+-][1-9][0-9]_[P-R][0-9]_*[._][0-9]*
Example of filename:
P101_+19_R0_3.0_QA.txt
I try to apply the filter in batch script but nothing happen.
Am i correctly defined the filter?
My script:
SET _ext1=txt
SETLOCAL ENABLEDELAYEDEXPANSION
for %%f in (%_source%\[PEQ]*_[+-][1-9][0-9]_[P-R][0-9]_*[._][0-9]*.%_ext1%) do (
echo %%f >> %LOG%
SET _path=%%~df%%~pf
echo !_path! >> %LOG%
SET _filename=%%~nf
echo !_filename! >> %LOG%
echo. >> %LOG%
echo Processing !_filename! >> %LOG%
IF EXIST !_path!!_filename!*.%_ext1% (
copy /Y "!_path!!_filename!*.%_ext1%" "%_target%" >> %LOG%
)
)
ENDLOCAL

Answer 1

I hope you understand the difference between a wildcard * matching any number of any chars and the RegEx * which means any number (also zero) of the previous match. Together with the RE . any char .* will resemble the wildcard *
#Echo off & SETLOCAL ENABLEDELAYEDEXPANSION
SET _ext1=txt
for /f "delims=" %%f in (
'dir /B "%_source%\*_*_*_*.%_ext1%" ^| Findstr /i "%_source%\[PEQ]*_[+-][1-9][0-9]_[P-R][0-9]_.*[._][0-9]*.%_ext1%" '
) do (
echo %%f >> %LOG%
SET _path=%%~df%%~pf
echo !_path! >> %LOG%
SET _filename=%%~nf
echo !_filename! >> %LOG%
echo. >> %LOG%
echo Processing !_filename! >> %LOG%
IF EXIST !_path!!_filename!*.%_ext1% (
copy /Y "!_path!!_filename!*.%_ext1%" "%_target%" >> %LOG%
)
)
ENDLOCAL
You should first test the line with the dir and findstr in an open cmd window,
then without the escaping ^ and surrounding '
dir /B "%_source%\*_*_*_*.%_ext1%"
If this fits as a first selection add
dir /B "%_source%\*_*_*_*.%_ext1%" | Findstr /i "%_source%\[PEQ]*_[+-][1-9][0-9]_[P-R][0-9]_.*[._][0-9]*.%_ext1%"
And vary your RegEx until it does what you want.
Remember that findstr RegEx capabilities are quite limited.