China DOS Union

@echo off

set "str=123*"

set str=%str:^*=%

echo %str%

I thought this would work, but unexpectedly it doesn't. I don't know why?

If you want something simpler:

@echo off

set "str=123*"

set str=%str:3*=3%

echo %str%

Uh, brother ccwan, one more question: in the following case, the asterisk appears randomly in the string.
If I want to replace only it, is there any other way?

@echo off

set "str=1234*567*89"

set str=%str:3*=3%

echo %str%

http://www.cn-dos.net/forum/viewthread.php?tid=30232&fpage=2

Take a look at the part about extracting numbers in there.

Brother slore
I looked, but didn't find a solution.

That one can extract from arbitrary characters... removing just the asterisk should be possible, right?

You can also try using FOR to do it, though it's rather rigid.

@echo off&setlocal

set "str=1234*567*89"

for /f "delims=* tokens=1,2*" %%a in ("%str%") do echo %%a%%b%%c

You can also try the method below; it's a bit more general than the one above.

@echo off&setlocal enabledelayedexpansion

set "str=1234*567*89.d;534*896"

set a=0&set c=0

:loop

if not defined c (echo %b%&goto:eof)

if not "!str:~%a%,1!" equ "*" (set b=!b!!str:~%a%,1!&set c=!str:~%a%!&set/a a+=1&goto:loop) else (set/a a+=1&goto:loop)

Question for brother ansipeter: what is the use of d[] in this line, set "str=1234*567*89.d[];534*896"??

Why not use sed?

echo 1234*567*89.d;534*896|sed "s/\*//g"

Looks like there really isn't a good way to replace it, so I'll have to consider using tools like sed to do it.
Thanks everyone for helping little brother think of solutions!!

Is there really no good way?

@echo off

set "str=12345*67*89"



:loop

for /f "delims=*" %%i in ("%str%") do call set "var=%%var%%%%i"

set "str_tmp=%str%"

set "str=%str:**=%"

if not "%str_tmp%"=="%str%" goto loop

echo "%var%"



pause

Impressive!
What's the principle behind it?

@echo off
set "str=1234*5***sdf*67*8*9*abcd*"

:loop
for /f "delims=* tokens=1*" %%a in ("%str%") do (
if not "%%a"=="%str%" set str=%%a%%b&& goto loop
)
echo %str%
pause




Thanks to digger for the correction

[ Last edited by slore on 2007-5-5 at 11:45 PM ]

slore's code is even more concise than mine, respect.

However, && has to be placed right after %%b, otherwise a lot of extra spaces will appear. You can see it if you use echo "%str%".