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Str trim /w var expansion
Posted: 23 Aug 2012 10:28
by ®ᴱᵴᴲᴙᴠᴱᴆ
How do you...
...using
Code: Select all
for /f "tokens=(val to get) delims=(/.- whatever)" %%- in ("%date%") do (
set ret=%%- ===> remove chars and expand to the val
)
I call outside the loop and set ret=%ret:~0,1%
How to trim, and set ret inside the loop...? using %%%%-:~0,1%%%% or whatever....
Thanks
Re: Str trim /w var expansion
Posted: 23 Aug 2012 14:24
by abc0502
Here is an example
Code: Select all
@echo off
cls
setlocal enabledelayedexpansion
for /f "skip=1 tokens=* delims= " %%a in ('ver') do (
set "ret=%%a"
echo !ret:~0,5!
)
pause
it will use the command ver to get output and set that out put to a variable "ret"
but while delayed Expansion enabled, u use ! ! instead of % %
Re: Str trim /w var expansion
Posted: 23 Aug 2012 15:00
by ®ᴱᵴᴲᴙᴠᴱᴆ
So, I would have to...
Is there not a way I can....
Code: Select all
set ret=!%%x:~0,1%! ....or something.
)
echo.%ret%
Re: Str trim /w var expansion
Posted: 23 Aug 2012 16:02
by abc0502
I don't know but i tried that before and couldn't do it.
Re: Str trim /w var expansion
Posted: 23 Aug 2012 16:46
by Ed Dyreen
®ᴱᵴᴲᴙᴠᴱᴆ wrote:Is there not a way I can....
Code: Select all
set ret=!%%x:~0,1%! ....or something.
)
echo.%ret%
Of course you can
But the result differs from what you expect.
@echo off &setlocal enableDelayedExpansion
for %%x in ( x ) do set x=t_h_i_s_w_o_r_k_s &set ret=!%%x:~0,1%! ....or something.
set ret
for %%x in ( x ) do set x=t_h_i_s_w_o_r_k_s &set x=!%%x:_=%!
set x
for %%x in ( x ) do set "x=y" &set y=t_h_i_s_w_o_r_k_s &call set x=%%!x!:~0,1%%
set x
for %%x in ( x ) do set "x=y" &set y=t_h_i_s_w_o_r_k_s &call set x=%%!x!:_=%%
set x
for %%x in ( t_h_i_s_w_o_r_k_s ) do set "x=%%x" &set "x=!x:~0,1!"
set x
for %%x in ( t_h_i_s_w_o_r_k_s ) do set "x=%%x" &set "x=!x:_=!"
set x
pause
exit
Code: Select all
ret=t ....or something.
x=thisworks
x=t
x=thisworks
x=t
x=thisworks
Druk op een toets om door te gaan. . .
Variable substitution works for variables not for read only tokens, hence the name.
Re: Str trim /w var expansion
Posted: 23 Aug 2012 23:08
by ®ᴱᵴᴲᴙᴠᴱᴆ
Thank you.
Klik hier om verder te gaan [x]
Interesting choice of dialect...or something
