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Batch files - number of command line arguments
...u tend to handle number of arguments with this sort of logic:
IF "%1"=="" GOTO HAVE_0
IF "%2"=="" GOTO HAVE_1
IF "%3"=="" GOTO HAVE_2
etc.
If you have more than 9 arguments then you are screwed with this approach though. There are various hacks for creating counters which you can find here, but...
How do I make a batch file terminate upon encountering an error?
...ou have to check the error after each command. There's no global "on error goto" type of construct in cmd.exe/command.com batch. I've also updated my code per CodeMonkey, although I've never encountered a negative errorlevel in any of my batch-hacking on XP or Vista.
...
Batch script loop
...ommands you want to repeat]
set /a loopcount=loopcount-1
if %loopcount%==0 goto exitloop
goto loop
:exitloop
Example: Say "Hello World!" 5 times:
@echo off
set loopcount=5
:loop
echo Hello World!
set /a loopcount=loopcount-1
if %loopcount%==0 goto exitloop
goto loop
:exitloop
pause
This example...
Simple state machine example in C#?
...ssState, Command>();
fsm.In(ProcessState.Inactive)
.On(Command.Exit).Goto(ProcessState.Terminated).Execute(SomeTransitionAction)
.On(Command.Begin).Goto(ProcessState.Active);
fsm.In(ProcessState.Active)
.ExecuteOnEntry(SomeEntryAction)
.ExecuteOnExit(SomeExitAction)
.On(Command.End...
How to edit log message already committed in Subversion?
...::::::::::::::::::::::::::::::::::::::::
if /I not '%propname%'=='svn:log' goto ERROR_PROPNAME
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: Only allow modifications to svn:log (no addition/overwrite or deletion)
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::...
Why does Lua have no “continue” statement?
...
In Lua 5.2 the best workaround is to use goto:
-- prints odd numbers in [|1,10|]
for i=1,10 do
if i % 2 == 0 then goto continue end
print(i)
::continue::
end
This is supported in LuaJIT since version 2.0.1
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IF… OR IF… in a windows batch file
...
I don't think so. Just use two IFs and GOTO the same label:
IF cond1 GOTO foundit
IF cond2 GOTO foundit
ECHO Didn't found it
GOTO end
:foundit
ECHO Found it!
:end
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...
Efficiency of premature return in a function
...a);
throw e
}
return 0;
}
Philip suggested, after looking at the goto example below, to use a break-less switch/case inside the catch block above. One could switch(typeof(e)) and then fall through the free_resourcex() calls but this is not trivial and needs design consideration. And rememb...
How can I make an “are you sure” prompt in a Windows batchfile?
...ROMPT
SET /P AREYOUSURE=Are you sure (Y/[N])?
IF /I "%AREYOUSURE%" NEQ "Y" GOTO END
echo ... rest of file ...
:END
endlocal
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How to exit an if clause
...at approach works nearly every time you're tempted to use a forward-moving goto. (And it both hints at and addresses situations where a single function is getting too big)
– Drew Dormann
Jan 15 '10 at 5:39
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