Assign Function Abnomily

[AutoitMike]

I have a need to create a number of variables like $Var_1, $_var2, ........$_VarN

The Assign function looks really good EXCEPT that if you try and USE any of the variables it creates, an exception is created:

"Warning:    $_Var1:   possibly used before declaration."

"ERROR:    $_Var1:   undeclared global variable"

Of course, if I declare them all, no problem. I just am trying to refactor my code to eliminate as many lines of code as possible.

If I declare them all, I have already CREATED them.

Is there any other way to dynamically create variables?

[Nine]

Disable au3check.  Then good luck to you.

You should really rethink your approach.

[Earthshine]

I don’t understand the concern with re-factoring a code and not declaring variables. Why do the number of lines of code even matter?

[Jos]

9 hours ago, AutoitMike said:

Is there any other way to dynamically create variables?

Simply use an Array.  

[HurleyShanabarger]

Use Eval:
 

#include <MsgBoxConstants.au3>

Example()

Func Example()
        ; Assign the variable string sString with data.
        Assign("sString", "This is a string which is declared using the function Assign")

        ; Find the value of the variable string sString and assign to the variable $sEvalString.
        Local $sEvalString = Eval("sString")

        ; Display the value of $sEvalString. This should be the same value as $sString.
        MsgBox($MB_SYSTEMMODAL, "", $sEvalString)
EndFunc   ;==>Example

 

[jchd]

The question remains: why play useless games with Assign & Eval in the first place?

[AutoitMike]

Hurley,

Thanks for the suggestion.

BTW

I dont have

<MsgBoxConstants.au3>

I get an error about variable not yet defined on

$MB_SYSTEMMODAL

Maybe because I dont have the message box constants. Is this file available on Autoit web site?

 

I will answer jchd's question here:

jc,

Usually, in a large program, hundreds of lines of code, it gets hard to manage it.

One good example to eliminate code (called refactoring) is when dozens of variables need to be created and assigned a value.

say I need to create 50 variables named $Lable_1 through $Label_55. This is what it would look like:
 

$Lable_1="ABC"

$Label_2="DEF"

$Label_3="GHI"

.

.

.

.

.

All the way to :

$Lable_55="ZZZ" ;Or what ever

 

Maybe not simpler but more CONCISE:

;Three lines of code
For $N=1 to 55

    Assign("Lable_" & $N, {the value needed}) ;here you would pull the value from an array that you created containing the value needed (well, one more line                                                ;of code)
    
Next

 

 

 

 

 

 

 

 

 

[jchd]

Then make your array 2D and store the controlID (useless for labels in most use cases) and the text. Or better yet, use a Map.

I've yet to see real-world code where Assign() is required or even useful.

[jchd]

BTW, the MsgBoxConstants.au3 UDF is part of the standard AutoIt install. Simply reinstall the latest version over your setup and you'll be on track.

[Earthshine]

Refactoring had nothing to do with not declaring variables. Just don’t create ones that you’re not using