is call set similar to subroutine name? what do you use call set LTRIM?

[nnnmmm]

Code: Select all

SETLOCAL ENABLEDELAYEDEXPANSION
call set "string=%%%~1%%"
set "charlist=%~2"
if not defined charlist set "charlist= "
for /f "tokens=* delims=%charlist%" %%a in ("%string%") do set "string=%%a"
( ENDLOCAL & REM RETURN VALUES
    IF "%~1" NEQ "" SET "%~1=%string%"
)
EXIT /b

this is left trim batch from your website,
i named it as ltrim.bat

then i did ltrim.bat " dddd"
where is the output?

i dont know what call is. it seems like subroutine ltrim (in$, out%)

Code: Select all

in$="   aaa"
call ltrim(in$,out$)
print out$

how can i have this sub effect? with batch call?

[aGerman]

then i did ltrim.bat " dddd"
where is the output?

That's not the way it is supposed to work. You really should have read the comments that are prepended to the code.
http://www.dostips.com/DtCodeCmdLib.php#Function.lTrim

So you need a variable with the string. You pass the variable name and the resulting string will be saved in the same variable.

Code: Select all

@echo off
set "mystring=   aaa"
call ltrim.bat mystring
echo %mystring%
pause

Steffen

[nnnmmm]

i am beginning to see how it works, thanks