D
Dominique
Guest
I want to put the whole alphabet in a string. For that, I need two variables, one containing the whole alphabet, the other containing a counter for the letters to be used, as follows:
The logic I've found, does this as follows:
As I have experience in other programming languages, I would opt for another approach:
Obviously my proposal is not working, but then I wanted to understand why, and I had a look at an official URL, explaining the
Now I'm lost: what is the relationship between chars in a string, and events (I understand an event as a button-click or something)? (I fear I'm completely misunderstanding this whole concept)
Edit, after some more research:
In the meantime I've understood that I can make the whole thing work, as follows:
This, however, only shows me that "normal" string-handling is possible in Progress, it does not yet explain the whole
Continue reading...
Code:
DEFINE VARIABLE i AS INTEGER.
DEFINE VARIABLE Alphabet AS CHARACTER FORMAT "x(30)".
The logic I've found, does this as follows:
Code:
/* Main logic */
i = ASC("a").
REPEAT:
APPLY CHR(i) TO Alphabet.
IF CHR(i)="z" THEN LEAVE.
i = i + 1.
END.
As I have experience in other programming languages, I would opt for another approach:
Code:
/* Main logic */
i = ASC("a").
REPEAT:
Alphabet = Alphabet + CHR(i). /* This line is different */
IF CHR(i)="z" THEN LEAVE.
i = i + 1.
END.
Obviously my proposal is not working, but then I wanted to understand why, and I had a look at an official URL, explaining the
APPLY
statement, stating the following:APPLY statement
Applies an event to a widget or procedure. Syntax
APPLY event [ TO widget-phrase ]
Now I'm lost: what is the relationship between chars in a string, and events (I understand an event as a button-click or something)? (I fear I'm completely misunderstanding this whole concept)
Edit, after some more research:
In the meantime I've understood that I can make the whole thing work, as follows:
Code:
/* Main logic */
i = ASC("a").
REPEAT:
Alphabet = Alphabet + CHR(i). /* This line is different */
IF CHR(i)="z" THEN LEAVE.
i = i + 1.
END.
Alphabet:SCREEN-VALUE = Alphabet.
This, however, only shows me that "normal" string-handling is possible in Progress, it does not yet explain the whole
event
-thing.Continue reading...