I have code practice question

[Guest]

Hello,

I have a question.

Is it true that there is no need to define variables as global if i define them not inside a function?

I noticed a long time ago that if i define a variable as local not inside a function then the variable act exactly like global variable because other functions can access the local variable and change the variable.

So I think there is no need to define a variable as global(by adding Global) because of the variable will work as global variable anyway in this case.

Is there still a reason to define variable as global if i define the variable not inside a function?

Edited May 8, 2014 by Guest

[JohnOne]

Been discussed many times before.

Some will say Yes, and some will say No.

So long as whatever is trying to access the variable is of the same or deeper scope it will be able to access it.

Not interested in a debate about best practice opinions.

[Guest]

Thanks for the answer

 

Does it have an effect on how much memory is consumed for the variable?

I guess not .. but maybe it's true .. I do not know

Edited May 8, 2014 by Guest

[BrewManNH]

In AutoIt there's no need to declare a variable using Global/Dim/Local, but it's really bad coding practice to not do it that way.

[Guest]

In AutoIt there's no need to declare a variable using Global/Dim/Local, but it's really bad coding practice to not do it that way.

My intention is to declare a variables in this way:

Example 1

Local $var1 , $var2
Test()
Func Test()
    If $var1+$var2 = 0 Then MsgBox(0,"","",1) ; The function can still access the variables
EndFunc

Instead of:

Example 2

Global $var1 , $var2
Test()
Func Test()
    If $var1+$var2 = 0 Then MsgBox(0,"","",1)
EndFunc

I have no intention to define variables like this:

Example 3

$var1 = ""
$var2 = ""
Test()
Func Test()
    If $var1+$var2 = 0 Then MsgBox(0,"","",1) ; The function can still access the variables
EndFunc

That ^ is really bad coding practice in my opinion.

 

Edit:

I ask what is better - Example 1 or Example 2 ?

Edited May 8, 2014 by Guest

[BrewManNH]

1 and 2 are identical as far as AutoIt is concerned. Any variable declared outside a function, regardless of the keyword used, is going to be a Global variable. So, use whatever you want, I prefer to use Global for global variables, and Local for variables inside functions, others have other ideas.

[Melba23]

gil900,

 

I prefer to use Global for global variables, and Local for variables inside functions

As do I.

M23

[Guest]

1 and 2 are identical as far as AutoIt is concerned. Any variable declared outside a function, regardless of the keyword used, is going to be a Global variable. So, use whatever you want, I prefer to use Global for global variables, and Local for variables inside functions, others have other ideas.

Thanks for the answer.

After reading your answer, I prefer Example 2