topic Swap A and B parameters in GDL

Swap A and B parameters

A_ Smith — Tue, 06 Sep 2022 06:28:43 GMT

Tbh I feel silly to ask such basic question, but I can't figure out how to swap values for A, B.

If additional parametes are created it's easy to change their values based on constant A, B. Though how to do it when with help of 2 parameters only? preferably main A, B.

https://drive.google.com/file/d/1TuKbeIqsUdWjve0QYYlYH62h2HNA5-T7/view?usp=drivesdk

Re: Swap A and B parameters

DGSketcher — Tue, 06 Sep 2022 06:51:08 GMT

@A_ Smith You need to clarify a bit more about where you are changing the values e.g. param-o or in a GDL script? In gdl you will need to create swap values e.g. a1 & b1 if you don’t want to loose the originals. You could also do a similar thing with Find & Replace.

Re: Swap A and B parameters

A_ Smith — Tue, 06 Sep 2022 07:06:43 GMT

GDL.

In parameter script I planned to swap A, B - at least for now (when "bSwap" is true), without saving original values. Kinda temp=A, A=B, B=temp

Originally I wanted to swap values each! time "bSwap" is changed... Just in order to find out why that doesn't work, decided to make it simpler.

Re: Swap A and B parameters

Lingwisyer — Tue, 06 Sep 2022 08:49:30 GMT

I would:

IF GLOB_MODPAR_NAME = bSwap then temp = A A = B B = temp PARAMETERS A = A PARAMETERS B = B PARAMETERS bSwap = 0 endIF

Ling.

Re: Swap A and B parameters

A_ Smith — Tue, 06 Sep 2022 09:11:15 GMT

Right, but that doesn't work...

Re: Swap A and B parameters

DGSketcher — Tue, 06 Sep 2022 10:42:22 GMT

Try Ling's Parameter Script extract without the 'Parameters bSwap = 0' you will then know if the values are swapped.

Re: Swap A and B parameters

A_ Smith — Tue, 06 Sep 2022 12:09:57 GMT

Well, I know it without deleting that row - it doesn't work as expected. I see that values don't change. Just to be sure, I removed it - all remais the same.

Unfortunatelly trying to help without actually checking it, doesn't do the job. Because, it's so simle lines of code (strange to say it though) that can't be wrong. Nevertheless they do not obey.

Re: Swap A and B parameters

DGSketcher — Tue, 06 Sep 2022 17:12:12 GMT

One for Grand Master @Peter Baksa I think. There appears to be some value protections in place for A, B & ZZYZX which don't apply to other parameters.

In the following, the values of A1 & B1 swap but the values of A, B & ZZYZX remain static...

!PARAMETER SCRIPT !Create values for bSwap (boolean) and A1 & B1 (real) in the parameters A1 = A B1 = B PARAMETERS A1 = A1, B1 = B1 IF GLOB_MODPAR_NAME = "bSwap" THEN IF bSwap = 1 THEN A = B1 B = A1 ZZYZX = A1 ELSE A = A1 B = B1 ZZYZX = B1 ENDIF PARAMETERS A = A, B = B, ZZYZX = ZZYZX ENDIF

Re: Swap A and B parameters

Lingwisyer — Wed, 07 Sep 2022 01:22:17 GMT

Odd... since I have replaced the A, B and ZZYZX values in objects before...

Re: Swap A and B parameters

Jochen Suehlo — Wed, 07 Sep 2022 08:12:12 GMT

If I change the script to following it works for me:

temp_A = A temp_B = B IF GLOB_MODPAR_NAME = "bSwap" then IF bswap = 1 THEN A = temp_B B = temp_A PARAMETERS A = A PARAMETERS B = B PARAMETERS bSwap = 0 ENDIF endIF

Re: Swap A and B parameters

Jochen Suehlo — Wed, 07 Sep 2022 08:13:21 GMT

If I change the script to the following, it works for me (AC 22 and 26 on macOS)

Re: Swap A and B parameters

DGSketcher — Wed, 07 Sep 2022 08:54:23 GMT

Logic failure on my part. 🙄 Without setting bSwap back to Zero the swap would be constantly valid and would try to change A & B every time the Parameter script was run.

So @A_ Smith a working solution...

!PARAMETER SCRIPT !Create values for bSwap (boolean) and A1 & B1 (real) in the parameters IF GLOB_MODPAR_NAME = "bSwap" THEN A1 = A B1 = B PARAMETERS A1 = A1, B1 = B1 IF bSwap = 1 THEN A = B1 B = A1 ENDIF bSwap = 0 PARAMETERS A = A, B = B, bSwap = bSwap ENDIF

OR use @Jochen Suehlo earlier solution which I missed due to this stupid forum formatting.

Re: Swap A and B parameters

A_ Smith — Wed, 07 Sep 2022 08:55:01 GMT

Indeed. Thanks.

Though, my brain still can't except that this works only due to overriding bSwap - "parameters bSwap=0". Without it should work too, right? just instead I would have to 'unckeck' bSwap and then make it true again (but that doesn't work).

Re: Swap A and B parameters

Lingwisyer — Thu, 08 Sep 2022 02:18:16 GMT

If you wanted to, you could double the script within the ModPar with IF bSwap = 1 then Else endIF. By doing this it should just keep swapping each time you check it.