@Environment Question Reloaded Please Help URGENT

I have a button carrys the code: (with other fields)

@Environment("InvoiceNumber"; @Text(InvoiceNumber));
@PostedCommand([FileCloseWindow]);
@PostedCommand([Compose]; ""; "Customer Log")

and the field has the code:

envvar := @Environment("InvoiceNumber");
@If(envvar != ""; @SetEnvironment( "InvoiceNumber"; ""); "");
envvar;

What i need is, if the button is pressed and the field already has an invoice number (which it would have) for a suffix of a, or if it has already a suffix of a then b and if it has already a suffix of b then c etc etc, but only one letter to be present at any time

Qwaletee gave me this, but it does not work:

envvar := @Environment("InvoiceNumber");
@SetEnvironment( "InvoiceNumber"; "");
@If(@Length(envVar = 6; @Return(envVar + "a"); CONTINUE );
letters := "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z";
base := @Left(envVar;6);
priorLetter := @Right(envVar;1);
newLetter := @Replace(priorLetter; "dummy" : letters; letters : "error- ran out of alphabet!");
base + newLetter

Any ideas URGENT




DavidAbbottAsked:
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RanjeetRainCommented:
What problem are you facing. The code seems to be correct.
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qwaleteeCommented:
Let's try to to debug this...


envvar := @Environment("InvoiceNumber");
@Prompt([OK]; "envvar"; envvar);
@SetEnvironment( "InvoiceNumber"; "");
@Prompt([ok]; "shortcut decision when no suffix yet"; @If(@Length(envVar = 6; "@Return (final result): " + envVar + "a"; "no shortcut, continuing") );
@If(@Length(envVar = 6; @Return(envVar + "a"); CONTINUE );
letters := "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z";
base := @Left(envVar;6);
@Prompt([ok];"base";base);
priorLetter := @Right(envVar;1);
@Prompt([ok];"priotLetter"; priorLetter);
newLetter := @Replace(priorLetter; "dummy" : letters; letters : "error- ran out of alphabet!");
@Prompt([ok];"newLetter";newLetter");
@Prompt([ok];"final result w/o shortcut"; base + newLetter);
base + newLetter

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HemanthaKumarCommented:
David,

I think I already gave you a simplified soln for the problem

anyway I repeat it here (There was a minor error in previous formula that I gave) here is the corrected one

envvar := @Environment("InvoiceNumber");
@SetEnvironment( "InvoiceNumber"; "");
@If(@Length(envVar = 6; @Return(envVar + "a"); CONTINUE );
alphas := "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z";
idx  := @If(@Ends(envvar;alphas); @member(@Right(envvar; 1); alphas); 0);
final := @leftback(envvar;1) + @if( idx > 0; @Subset(@Subset(alphas;idx+1);-1);  "");
final

~Hemanth
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DavidAbbottAuthor Commented:
qwaletee

it is cutting off one of the numbers and not adding the first letter in the first instance
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HemanthaKumarCommented:
do you ever hear me ?
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qwaleteeCommented:
HemanthaKumar,
That's simplified?  OK, so it is 7 lines instead of 8.  That's only due to desnity.  M original code was meant to be readiable.  Wanna see it dense?  Only 4 lines.  Can you get it tighter without repeating @Environment or letters/alphas list?

envvar := @Environment("InvoiceNumber");
@SetEnvironment( "InvoiceNumber"; "");
letters := @If(@Length(envVar = 6; @Return(envVar + "a"); "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z");
@Left(envVar;6) + @Replace(@Right(envVar;1); "dummy" : letters; letters : "error- ran out of alphabet!");
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qwaleteeCommented:
DavidAbbott,
> qwaletee

> it is cutting off one of the numbers and not adding the first letter in the first instance
Could you please give me the eaxt sequence of prompt messages?  For example, I would expect something like:

envvar: 123456
shortcut decision when no suffix yet: @Return (final result): 123456a

I know it is tedious, but I can't tell where it cuts it off unless I know all the steps it takes!

In the case of 123456a, it should result in the following prompts:
envvar: 123456a
shortcut decision: no shortcut
base: 123456
priorLetter: a
newLetter: b
final result w/o shortcut: 123456b

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HemanthaKumarCommented:
your formula is hardcoded for a fixed length, mine doesn't rely on that and mostly generic code.. I am not telling your code is wrong.. If that is so then try to answer the previous thread where you proposed the soln.. I am trying to give him a new direction in this new question...
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qwaleteeCommented:
I figured that the current format is 6-dgot plus 1 alpha.  To be really certain, you would have to use an @Matches check for either 6 digits alone, or 6 digits plus one alpha.  In either case, at that point, the break occurs after 6.  If there was any change, it cold be to 7 numbers (a problem for my code), or to a number/letter mix (a problem  for your code).
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HemanthaKumarCommented:
Let us not argue on this.. Let David work it out.
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DavidAbbottAuthor Commented:
Hi

Sorry, just got back, the following code bums out on my machine and says too many functions etc

envvar := @Environment("InvoiceNumber");
@SetEnvironment( "InvoiceNumber"; "");
letters := @If(@Length(envVar = 6; @Return(envVar + "a"); "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z");
@Left(envVar;6) + @Replace(@Right(envVar;1); "dummy" : letters; letters : "error- ran out of alphabet!");

so does:

envvar := @Environment("InvoiceNumber");
@SetEnvironment( "InvoiceNumber"; "");
@If(@Length(envVar = 6; @Return(envVar + "a"); CONTINUE );
alphas := "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z";
idx  := @If(@Ends(envvar;alphas); @member(@Right(envvar; 1); alphas); 0);
final := @leftback(envvar;1) + @if( idx > 0; @Subset(@Subset(alphas;idx+1);-1);  "");
final




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qwaleteeCommented:
Left a paren off: letters := @If(@Length(envVar = 6     )     ; @Return(envVar + "a"); "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z");


But that code is essentially identical to what I gave you last time.  You the version with the embedded prompts, s we can debug this thing, OK?!
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DavidAbbottAuthor Commented:
OK this code produces the following results:

With the invoice number being 328072

envvar = 328072
base = 328072
priorletter = 2
newletter = 2
final result = 328072

>>CODE<<

envvar := @Environment("InvoiceNumber");
@Prompt([OK]; "envvar"; envvar);
@SetEnvironment( "InvoiceNumber"; "");
@Prompt([ok]; "shortcut decision when no suffix yet"; @If(@Length(envVar = 6; "@Return (final result): " + envVar + "a"; "no shortcut, continuing") );
@If(@Length(envVar = 6; @Return(envVar + "a"); CONTINUE );
letters := "a":"b":"c":"d":"e":"f":"g":"h":"i":"j":"k":"l":"m":"n":"o":"p":"q":"r":"s":"t":"u":"v":"w":"x":"y":"z";
base := @Left(envVar;6);
@Prompt([ok];"base";base);
priorLetter := @Right(envVar;1);
@Prompt([ok];"priotLetter"; priorLetter);
newLetter := @Replace(priorLetter; "dummy" : letters; letters : "error- ran out of alphabet!");
@Prompt([ok];"newLetter";newLetter");
@Prompt([ok];"final result w/o shortcut"; base + newLetter);
base + newLetter
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DavidAbbottAuthor Commented:
Oh no, I am in trouble, no solution
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DavidAbbottAuthor Commented:
Correction on that code produce:

envvar = 328072
base = 328072
priorletter = 2
newletter = 2
final result = 3280722

sorry
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DavidAbbottAuthor Commented:
OK, worked on it and i think it is completed. From my understanding the problem bit was:

@If(@Length(envVar = 6); @Return(envVar + "a"); CONTINUE );

As it was completely ignoring the logic in the arguement and as such just continued on regardless, hence the adding of the last number if it did not have an alpha.

Most other code for some reason ignored the logic and skipped the condition after much trail and error, this following line of code replaced the above, and it worked:

@If(!@Ends(envVar;letters); @Return(envVar + "a"); CONTINUE );

Thanks for the help,


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DavidAbbottAuthor Commented:
both you guys (qwaletee & HemanthaKumar) helped greatly and i obtained understanding from both sets of answers, but there can only be one main answered and one assisted acceptance, so on balance i think qwaletee came out on top this time.

Thanks to you both
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qwaleteeCommented:
I got it!


Change:
@If(@Length(envVar = 6); @Return(envVar + "a"); CONTINUE );   ...into...
@If(@Length(envVar) = 6; @Return(envVar + "a"); CONTINUE );

Misplaced parenthesis on @Length.
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