China DOS Union

...........No consideration was given to this matter...It's over...........

@echo off
set runtimes=0
FOR /F "delims=" %%i in (myfile.txt) do (
call :func1 "%%i" "%%i"
)
pause
pause
pause
:func1
set /a runtimes=%runtimes%+1
set EL=1
set T1=%1
set T1=%T1: =%
if NOT %T1%=="" set EL=0
if %EL%==0 (
if NOT %runtimes%==1 echo+>>done.txt
set /p "null=%2"<nul>>done.txt
)
goto :EOF

Hehe..Indeed interesting..Creative..Learned!~

Originally posted by knoppix7 at 2007-8-30 05:33 PM:
...........没有考虑这个事。。。完了。。。。。。。

@echo off
set runtimes=0
FOR /F "delims=" %%i in (myfile.txt) do (
call :func1 "%%i" "%%i"
...

The spaces in front of non-empty lines are also removed.

It can be used like this. Note that there is a space before *, sed "/^ *$/d"

# Delete all blank lines in the file
sed '/^$/d' # Method 1
sed '/./!d' # Method 2