filename datestamp issue

[Ed Dyreen]

'
Still don't get it

why does

Code: Select all

del "dummy.txt" 2>nul
for %%a in ("dummy.txt") do echo %%~aa

expands to

Code: Select all

>del "dummy.txt"  2>nul
>for %a in ("dummy.txt") do echo %~aa
>echo
ECHO is on (aan).

while it should expand to

Code: Select all

>del "dummy.txt"  2>nul
>for %a in ("dummy.txt") do echo %~aa
>echo a
a

?

[Ed Dyreen]

'
Now it make sense

Code: Select all

del "dummy.txt" 2>nul
for %%? in ("dummy.txt") do echo %%~a?

This however never fails

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del "dummy.txt" 2>nul
for %%? in ("dummy.txt") do echo %%~??
for %%? in ("dummy.txt") do echo %%~?a

Haha, Now I remember why I don't like alpha-numeric and now we can start this discussion all over again


Thanx !

[aGerman]

Actually there is no need to discuss which is better. Both have pros and cons. The main thing is you'll take the right decision in the right case, isn't it

Regards
aGerman

(BTW I've just noticed that we're totally off topic in this thread )

[foxidrive]

Alpha characters have also side effects. For that reason it's really nothing but a question of the style one would prefer.

Code: Select all

@echo off &setlocal

del "dummy.txt" 2>nul
for %%a in ("dummy.txt") do echo %%~aa
for %%A in ("dummy.txt") do echo %%~Aa
for %%A in ("dummy.txt") do echo %%~AA

>>"dummy.txt" type nul
for %%a in ("dummy.txt") do echo %%~aa
for %%A in ("dummy.txt") do echo %%~Aa
for %%A in ("dummy.txt") do echo %%~AA

pause

You are misusing the commands above, and also have case sensitive issues. It's got nothing to do with alpha metavariables.

Here is a sample with the case sensitive issues removed.

Code: Select all

@echo off &setlocal

del "dummy.txt" 2>nul
for %%a in ("dummy.txt") do echo %%~aa
for %%a in ("dummy.txt") do echo %%~Aa
for %%a in ("dummy.txt") do echo %%~Aa

>>"dummy.txt" type nul
for %%a in ("dummy.txt") do echo %%~aa
for %%a in ("dummy.txt") do echo %%~Aa
for %%a in ("dummy.txt") do echo %%~Aa


del "dummy.txt" 2>nul
for %%A in ("dummy.txt") do echo %%~aA
for %%A in ("dummy.txt") do echo %%~AA
for %%A in ("dummy.txt") do echo %%~AA

>>"dummy.txt" type nul
for %%A in ("dummy.txt") do echo %%~aA
for %%A in ("dummy.txt") do echo %%~AA
for %%A in ("dummy.txt") do echo %%~AA

pause

[aGerman]

You are misusing the commands above, and also have case sensitive issues.

I'm aware of that. But as you can see it has a big potential for misunderständings

Regards
aGerman

[foxidrive]

You are misusing the commands above, and also have case sensitive issues.

I'm aware of that. But as you can see it has a big potential for misunderständings

Regards
aGerman

hehe Syntax confusion? Welcome to batch files 101.