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American dialectologists have evidence showing wait on (sense 3) to be more a Southern than a Northern form in speech. Handbook writers universally denigrate wait on and prescribe wait for in writing. Our evidence from printed sources does not show a regional preference; it does show that the handbooks' advice is not based on current usage.
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I guess there are times when your script can get ahead of itself in terms of executing code before a previously scripted operation has completed, and putting a wait(x) command after such operations is one way of trying to ensure that the operation completes before continuing with your script.
Apologies if this seems a rather broad/vague discussion. It's stemming from the fact that I'm trying to improve the execution time of a script I have, and the profiler is saying that a lot of time is being spent on these wait commands that I've inserted after the type of operations mentioned above. I appreciate any insight into this or if there are resources available that I can look at, even better. Cheers!
"it seems that you just have to run into certain problems before you know when its required" ... I'd agree with that. Using a wait unnecessarily will slow your code down. I only use it if my code fails and the Wait is the only way to fix it.
I've done a quick search on my code and here are some examples - they all relate to interactions with windows. I couldn't find any examples where core JMP tasks such as table manipulations needed a wait.
Performing a computationally intensive task (loop) and wanting to push information out to the user - you need to gives windows some breathing time to perform the refresh (alternatively in this example a "reshow" message could be sent to the window containing the text box)
StatusMsg was invented before we had the multiple document interface for JMP and so it is unpredictable which window is used to display the message. Using a Wait ensures you have the current windows attention
Case 2: Bad Case - if I open up the JRN as JMP Addin menu, it doesn't work. The log seems to show unknown display boxes (which are contained in JSL at various points). Also, if I just watch these two cases, Case 2 is executing faster than Case 1 even to my eye! And no, in this case all file references are fine, both cases use the exact same JRN/JSL's on my local PC, and even the way I tell it to open in the JMP Addin makes no differences (whether "path">$ADDIN_HOME vs "text">open).
So in my case, it seems even how JMP loads things can matter to the timing. I think in my Case 2 above, JMP is just able to load my JRN and subsequent scripts much faster, but it unfortunately affects the timing in a negative way. Anyways, my approach will be to try some wait(0); 's to see if I can slow JMP down a bit. cheers, dj
Followup. I was fooled here about the timing. As it turns out there this odd checkbox in the Addin wizard: "Use the Here namespace for unqualified JSL variable names". Uncheck it and my problems went away. This explains why my JRN would not execute the JSL in its ButtonBox. -dj
You probably want that checkbox checked. Using the Here Namespace is just good coding and I would encourage you start all your scripts with 'Names Default to Here(1);' If you don't use the here namespace (or a namespace of your choosing) then JMP will assign everything as global variables. For testing and personal code this isn't a big deal, but if you are putting a script into an add-in I'm assuming it's going to be used for production.
Using the Global namespace will surely give issue for production scripts. Most common issue is unintentionally overriding common variables, like "dt" or "datatable". Other issues involve running two scripts or addins at the same time. For example, both may have For() loops, and since the variable "i" is commonly used for For() loops, and "j" for embedded For() loops if they both start running, you may find yourself running an infinite loop where "i" keeps being changed by the two different scripts.
Using the Here Namespace avoids these issues since each script is assigned a temporary namespace as long as the script is open or running. Thus, "i" is local to the script and you won't have to worry about accidental reassignments.
There are about a million ways to fix your button box issue while still using the Here namespace. Defining certain robust variable names as global that the button can use. Defining and using your own namespace (so you don't have to come up with a robust variable name). Redefining key variables in the button box's script so they are reassigned when the button is pushed. Using
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