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laurin1

Unset, destroy variable, clear array

10 posts in this topic




ummm u dont have to clear them you can just set them to something else and it will overwrite it

$variable = 5
MsgBox(0,"variable",$variable)
$variable = 130
MsgBox(0,"variable",$variable)

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ummm u dont have to clear them you can just set them to something else and it will overwrite it

$variable = 5
MsgBox(0,"variable",$variable)
$variable = 130
MsgBox(0,"variable",$variable)

I understand that. However, there are times when I want to make sure the variable is cleared, especially with arrays. From my tests, it appears even arrays can be cleared by setting them $array = ''; but I want to make sure.


Keith Davis

MCSA, ZCE, A+, N+

http://www.laurinkeithdavis.com

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yes setting it to blank would clear them but it would be a waste of your time

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yes setting it to blank would clear them but it would be a waste of your time

No, it wouldn't be as waste of my time. I've got an array that is used with a hashing function which is reused, but needs to be cleared before it is reused.


Keith Davis

MCSA, ZCE, A+, N+

http://www.laurinkeithdavis.com

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#6 ·  Posted (edited)

This is not enought. If you have custom functions with local arrays you dare to get trash from it.

This is the case in the usefull Call() calls, with a array as argument and 'CallArgArray' in array[0]. You will get all wrong.

Is needed wipe manually, example:

Func __CustomCall($sCadenaLlamada)
;[....]
Local $aArgvs=StringSplit($sArgvs,',',1)
Local $coder=$aArgvs[0]
$aArgvs[0]='CallArgArray'
$CallReturn=Call($sFuncName,$aArgvs)
For $i=0 To $coder ; Wipe Array
 $aArgvs[$i]=Null
Next
If @error=0xDEAD Or @extended=0xBEEF Then
 $coder=0
Else
 $coder=$CallReturn
EndIf
;[....]
Return($coder)

 

Edited by zalomalo

My english shucks, i know it.

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#7 ·  Posted (edited)

If you want to destroy you array, just set you array variable to 0 :

$aArray = 0

Edit :

Also, you can read the Keyword Dim / Global / Local / Const page in the helpfile :

To erase an array (maybe because it is a large global array and you want to free the memory), simply assign a single value to it:
$aArray = 0
This will free the array and convert it back to the single value of 0

Edited by jguinch

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Necroing an 8 1/2 year old thread isn't a record, but it's close.


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#10 ·  Posted (edited)

Sorry a lot, i didnt realise was so old post. Sorry.

But, jguinch is wrong. Is not enough, i have read the documentation and done 1000 test.

Tell me if you are interested in discuss this issue.

Cheers.

Edited by zalomalo

My english shucks, i know it.

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