Batch to remove duplicate rows from text file

Question

Is it possible to remove duplicate rows from a text file? If yes, how?

Answer 1

set "file=%CD%\%1"
sort "%file%">"%file%.sorted"
del /q "%file%"
FOR /F "tokens=*" %%A IN (%file%.sorted) DO (
SETLOCAL EnableDelayedExpansion
if not [%%A]==[!LN!] (
set "ln=%%A"
echo %%A>>"%file%"
)
)
ENDLOCAL
del /q "%file%.sorted"

This should work exactly the same. That dbenham example seemed way too hardcore for me, so, tested my own solution. usage ex.: filedup.cmd filename.ext