Inverse on boolean condition

i mam new to labview and have come across a problem i cannot workout;
I require an inversion of boolean state on one line when the boolean state changes from false to true on another line.
Context: Voice triggered headlights (where other elements also have an effect on the headlights) the headlight turns ON/OFF upon the recognition of a voice command.

Hello rkstokes,
that example should do it...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome
Attachments:
Trigger.vi ‏20 KB

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Boolean Condition on a Tab Not Working

Hello!
I have a tab that should only appear if a record is in the database. I'm using a 'PL/SQL Function Body Returning a Boolean' condition with the following:
DECLARE
t1 varchar2(20);
BEGIN
select GROUP into t1 from pl_department where userid = :APP_USER;
if ((t1 = '-') OR (t1 is null) OR (t1 = '') or (t1 = '%' || 'null%')) then
return false;
else
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end if;
END;
If no data is found in the database, i get an error at the top of my page 'Invalid function body condition: ORA-01403: no data found'.
As you can see I tried to check for 4 different possible values but nothing is working.
Any ideas on what else I can try?
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Edited by: 73pixieGirl on Dec 16, 2008 6:34 AM

Hello,
You can better use the condition Exists (SQL Query returns at least one row)
In expression 1 you would put : select GROUP from pl_department where userid = :APP_USER;
The problem you are facing is that your code is going into exception. If you really want to keep your code you can adapt it like:
DECLARE
t1 varchar2(20);
BEGIN
select GROUP into t1 from pl_department where userid = :APP_USER;
if ((t1 = '-') OR (t1 is null) OR (t1 = '') or (t1 = '%' || 'null%')) then
return false;
else
return true;
end if;
EXCEPTION WHEN NO_DATA_FOUND THEN return false;
END;
But I would recommend my first suggestion.
Regards,
Dimitri
http://dgielis.blogspot.com/
http://www.apex-evangelists.com/
http://www.apexblogs.info/
REWARDS: Please remember to mark helpful or correct posts on the forum

Boolean Condition Expressions

Unlike Condition Formats, Paragraphs, etc., Boolean Condition Expressions are apparently not stored in a linked list. In ExtendScript, you can get a list of the Expression names with this:
var doc = app.ActiveDoc;
var exprCat = doc.GetBuildExprCatalog();
This gives you an array of strings containing the Expression names. I am not sure what the FrameScript or FDK equivalents are, but I assume there is a way to do this.
Once you have the list, you can get each definition by doing this:
for (var i = 0; i < exprCat.length; i += 1) {
var expr = doc.GetBuildExpr (exprCat[i]);
Console ("Name: " + exprCat[i] + " Definition: " + expr);
I hope this will helpful to someone in the future. Please let me know if you have any questions or comments. Thank you very much.
Rick

Hello,
You can better use the condition Exists (SQL Query returns at least one row)
In expression 1 you would put : select GROUP from pl_department where userid = :APP_USER;
The problem you are facing is that your code is going into exception. If you really want to keep your code you can adapt it like:
DECLARE
t1 varchar2(20);
BEGIN
select GROUP into t1 from pl_department where userid = :APP_USER;
if ((t1 = '-') OR (t1 is null) OR (t1 = '') or (t1 = '%' || 'null%')) then
return false;
else
return true;
end if;
EXCEPTION WHEN NO_DATA_FOUND THEN return false;
END;
But I would recommend my first suggestion.
Regards,
Dimitri
http://dgielis.blogspot.com/
http://www.apex-evangelists.com/
http://www.apexblogs.info/
REWARDS: Please remember to mark helpful or correct posts on the forum

In our program, we are concerned about reducing CPU work; how to wait until a boolean condition changes in a "while loop"?

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Thank you.

Use /functions/time and dialog/wait until next millisecond multiple in the
loop. Input 100ms.
"mcdesm" wrote in message
news:[email protected]..
> In our program, we are concerned about reducing CPU work; how to wait
> until a boolean condition changes in a "while loop"?
>
> Is there a way to wait until a boolean condition changes (instruction
> is sent) in a "while loop" (because I want the program run until I
> press exit button)? Now it is consuming a lot of CPU because it is
> running the loop very fast waiting for instructions unless I stop the
> program.
>
> Thank you.

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Executing a boolean condition stored in component variable

Hi there everyone (posted this earlier on my browser but
didn't seem to come
thru, so apologies if this appears twice)
I have created a component variable called booleanCondition
which contains
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"Adam West" <[email protected]> wrote in message
news:f2h8kt$eok$[email protected]..
> Hi there everyone (posted this earlier on my browser but
didn't seem to
> come thru, so apologies if this appears twice)
>
> I have created a component variable called
booleanCondition which contains
> an expression like (a || b)
>
> I would then like to perform a conditional statement
like:
>
> a=0;
> b=1;
> if (booleanCondition == true){
> //execute code
> }
>
> but i don't seem to be able to get Flash to execute the
contents of the
> variable...it is just saying booleanCondition is holding
(a || b)
>
> Can anyone save me from my nightmare!!!
>
> Cheers
>
> Adam :)
>

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Sent from Cisco Technical Support iPad App

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Edited by: Magesh Magesh on Dec 26, 2008 11:28 AM

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Inverse on boolean condition

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