Keyword 'Global' is not really useful ... use Shared

[NoahPhense]

Do you really want all that hassle?

Yeah man... don't hassle the hoff...

- np

[Amiga5k]

> If you use Global very often (You like it?) it seems to be a bad design of your code

No it's not. I use it for variables that NEVER change, such as appname$ that
holds the name of the running exe.

Isn't another name for a variable that never changes a "Constant"?

Russell

[Henrik]

> If you use Global very often (You like it?) it seems to be a bad design of your code

No it's not. I use it for variables that NEVER change, such as appname$ that
holds the name of the running exe.

Isn't another name for a variable that never changes a "Constant"?

Russell

@Amiga5k not really.
A Constant can't be defined by a variabel, whereas a global can be, and at runtime and stille never change after that, if you like.

best Henrik

[PB]

> Isn't another name for a variable that never changes a "Constant"?

Yes, but only when the variable's value is already known. Observe:

Code: Select all

#appname=ProgramFilename()

[Trond]

Well, there you changed it (it was null when the program started, now it's "PureBasic1.exe" or something).

[PB]

> you changed it

Technically: yes, of course a variable will change once you give it an inital value.

[Amiga5k]

And you did say that you would "Never" change it... Just messing with ya here, but there is a subtle difference. It could, however, be useful to allow Constants to be defined initially with a variable - under certain rules of course (such as the example given). But I suppose in that situation you would just use a Global.

Russell

[Dare]

I'm not sure I see how a constant can be assigned a variable value.

Maybe special constants could be created such as #PB_ProgramFileName, but they would not be real constants. PureBasic would have to do some hidden initial code to assign the value to the Psuedo-Constant. And in such a case there would be no real gain for the programmer or the program over using the Global approach as PB outlined.