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Wolfiesaxah

Do I need to release each variables to re-use them?

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Wolfiesaxah

Hi Guys, just a simple confirmation, I have a script that starts with a "while" loop and inside that while-loop there's tons of actions/scripts and tons of variables declared as "Local". My question is when the first round of while-loop script is done, do I need to release each variables before looping? I'm asking because there's a lot of variables inside that loop. These variables will be re-used in each loop.

 

while 1

 Local $VariableaA = "This is the first variable"

 Local $VariableaB = "This is the 2nd variable"

;More stuffs here

VariableaA = 0        ;<----DO I STILL NEED TO RELEASE EACH VARIABLES OR THE "Local" RE-DECLARATION AT THE START OF THIS LOOP AUTOMATICALLY DOES THAT? OR I GUESS THE ASSIGNING OF NEW VALUES KINDA RE-USES THEM.:)

VariableaB = 0

WEnd

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water

Have you tested what the values of the variables are after the first loop?


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water

A test as simple as this would show you how AutoIt works:

Local $Test = "Test"
ConsoleWrite($Test & @CRLF)
Local $Test = "Test2"
ConsoleWrite($Test & @CRLF)
Local $Test
ConsoleWrite($Test & @CRLF)

 


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ExcelChart (2017-07-21 - Version 0.4.0.1) - Download - General Help & Support - Example Scripts
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Wolfiesaxah

Awesome! I didn't know Autoit has ConsoleWrite :)

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water

But the first place to look at is the help file:

Declaring a variable with a simple value in the same scope will not change the value in the variable.


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ExcelChart (2017-07-21 - Version 0.4.0.1) - Download - General Help & Support - Example Scripts
PowerPoint (2017-06-06 - Version 0.0.5.0) - Download - General Help & Support
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Word - Wiki
 
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ADO - Wiki

 

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water

Awesome! I didn't know Autoit has ConsoleWrite :)

​Then you should have a look at the AutoIt tutorials in the wiki or the help file to get a better understanding of how AutoIt works ;)


My UDFs and Tutorials:

Spoiler

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Active Directory (NEW 2018-10-19 - Version 1.4.10.0) - Download - General Help & Support - Example Scripts - Wiki
OutlookEX (2018-10-31 - Version 1.3.4.1) - Download - General Help & Support - Example Scripts - Wiki
ExcelChart (2017-07-21 - Version 0.4.0.1) - Download - General Help & Support - Example Scripts
PowerPoint (2017-06-06 - Version 0.0.5.0) - Download - General Help & Support
Excel - Example Scripts - Wiki
Word - Wiki
 
Tutorials:

ADO - Wiki

 

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jchd

It's also better for variables used in loops to be declared once before the loop. The Local qualifier doesn't limit them to the loop block: their scope is local to the function they are in, or the whole script when they are not declared inside a function, starting from the point of declaration. There is no other scoping construct like { ... } in C, for instance, like it or not.

That also means that if you assign a significantly large value to a variable (like FileRead a very large text file or create a huge array) its content will persist outside of a loop and it's up to you to free the memory used by re-assigning 0 to it (re-assigning to an empty string will not free memory used by a string variable).


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