Why some people say Local Variables are bad...

[RavensFan]

And no way to stop that program without crashing the car!

[StevenA]

I like the "//" in all the comments in post 11...destined for variable abuse.

[Ray.R]

// LOL! 

// You're right!  That's got to be a hardcore "Learn to program in C++ in 21 days"..  🙂 

// Let's make sure comments are real comment

/*  The C version would have been like this.

LOL! 😄  */

[Ray.R]

Another race condition spotted by smercurio in this thread

[altenbach]

---

JoeLabView wrote:

Another race condition spotted by smercurio in this thread

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This just updates an indicator and the value will be correct 5ms later. No big deal except for the fact that it updated the indicator with every iteration,

despite the fact that the value only needs to update at rare occasions.

He also points out a race condition for the x and y booleans in the same post. These might be more serious because further calcuations in the same

iteration directly depend on the possibly stale values.

Message Edited by altenbach on 05-24-2008 10:17 AM

[altenbach]

Well, value properities are about the same as locals (except for less efficiency ;)).

Check out the VI posted here: http://forums.ni.com/ni/board/message?board.id=170&view=by_date_ascending&message.id=326731#M326731

Note in which order the "Experiment scenario" get it's values. 😮

As soon as the calculated data from the formula node is inserted, all gets overwritten by the default data and placed back in the original control.

Message Edited by altenbach on 05-27-2008 01:48 PM

[smercurio_fc]

In this thread, apparently we have to use a local variable to turn the occurrence of an error to stop the loop (rather than a simple unbundle and Boolean operator).




Message Edited by smercurio_fc on 05-28-2008 01:55 PM

[JeffOverton]

or just wiring the error cluster to the loop

[smercurio_fc]

Except that you need to be able to stop the loop on either of 2 (or both) conditions.


Message Edited by smercurio_fc on 05-28-2008 02:16 PM

[altenbach]

That was my first idea too, but I think he also wants to be able to stop the loop manually.