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View Replies (2)

Resolved Function GOTO not working in APPEON workspace

  1. How-to
0
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  1. Ingmar Thomassen
    Ingmar Thomassen
  2. PowerServer
  3. Monday, 21 November 2022 12:03 PM UTC

Hi

I experience problems with the GOTO function in appeon mobile

Is this function still working on tablet, and IF not is there an other function to skip a peace of code.

 

Example

 

IF li_x = 1 THEN

     ........
ELSE
     GOTO STOP
END IF

 

IF li_x = 1 THEN
        ........

ELSE
      ......
END IF

 

STOP:

 

PB 2019 RB

Appeon workspace 2670

Enable Cors in Powerser
Unsupported Powerserver 2022 datawindow retrieve
Accepted Answer
Olan Knight
Olan Knight Accepted Answer Pending Moderation
  1. Monday, 21 November 2022 16:57 PM UTC
  2. PowerServer
  3. # Permalink

<Personal rant>

There is NOTHING wrong about using a GOTO statement in structured programming, as long as the flow of the logic is clear and concise, and you are not creating spagetti code. Often, using a GOTO is far easier to read and debug than would be the equivalent set of nested IF statements. Just remember that when at all possible to use s SINGLE entry and exit point from any event or function.

Another advantage of using the GOTO/Label construct is a clean flow from multiple conditions.

IF (condition A) THEN GOTO Check_Option_B
...processing
IF (this occurs) THEN GOTO Exit_Function

IF (condition B) THEN GOTO Check_Option_B
...processing
IF (that occurs) THEN GOTO Exit_Function

IF (condition C) THEN GOTO Check_Option_B
...processing
IF (the other thing occurs) THEN GOTO Exit_Function

IF (condition D) THEN GOTO Check_Option_B
...processing


Check_Option_B:
IF (conditions are met) THEN
   ...do this processing
END IF

Exit_Function:
   RETURN

</Personal rant>

Comment
Andreas Mykonios
  1. Andreas Mykonios
  2. Monday, 21 November 2022 17:10 PM UTC
Hi Olan.

The limitation comes from Powerserver. Goto isn't supported.
  1. Helpful
Olan Knight
  1. Olan Knight
  2. Tuesday, 22 November 2022 23:34 PM UTC
I know. This is just my reaction to generic "GOTOs are bad" statements.
  1. Helpful
Ingmar Thomassen
  1. Ingmar Thomassen
  2. Tuesday, 29 November 2022 08:28 AM UTC
Thanks, I found GOTO very usefull and quick. To bad it's not supported
  1. Helpful
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Responses (2)
Andreas Mykonios
Andreas Mykonios Accepted Answer Pending Moderation
  1. Monday, 21 November 2022 12:38 PM UTC
  2. PowerServer
  3. # 1

Hi.

Goto statement isn't supported in appeon powerserver 2020... See the following link:

PowerScript Statements - - Workarounds & APIs Guide (appeon.com)

Andreas.

Comment
Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Monday, 21 November 2022 16:38 PM UTC
Correct Anfreas as PS2020 is based on the jScript language where the GOTO is non-existent. However, this command is supported in PS 2021/2022 & higher. ;-)
  1. Helpful 1
Andreas Mykonios
  1. Andreas Mykonios
  2. Monday, 21 November 2022 17:12 PM UTC
Yes, but as he works with PB 2019 he is on the old PowerServer.
  1. Helpful
Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Wednesday, 23 November 2022 00:03 AM UTC
Same JScript issue Andreas on that PS release as well.
  1. Helpful
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