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LurchMan

Variable Comparing

4 posts in this topic

#1 ·  Posted (edited)

Hello all - 

I don't need any help with a script this time just help explaining a snippet:

Local $Array[3] = [0, 1, ""]

For $i = 0 To UBound ($Array) - 1

    If $Array[$i] <> "" Then
        ConsoleWrite ('Value of array: ' & $Array[$i] & ' $Array[' & $i & '] is not ""' & @CRLF)
    Else
        ConsoleWrite ('Value of array: ' & $Array[$i] & ' $Array[' & $i & '] is ""' & @CRLF)
    EndIf

Next

Output:

Value of array: 0 $Array[0] is ""
Value of array: 1 $Array[1] is not ""
Value of array:  $Array[2] is ""

 

 

 
 

I understand why 0 gets translated as not <> "" as all three (0, "", False) would be translated as false.   Now the question - Is there a more standardized way to deal with these situations?  

I have a section of a script that would fill in an array and do compares similar to the one above and it was checking to see if an element had data in it.  Some of the data would be 0 and comparing it to "" would always return as True as seen above.  I obviously got around this by comparing the element to -1 instead of "" as all the data in this case was numerical but is there a better way to achieve this?

I apologize if this isn't well written, my thoughts are all over the place on this one.  Thanks for any thoughts in advance.

Edited by LurchMan

Dating a girl is just like writing software. Everything's going to work just fine in the testing lab (dating), but as soon as you have contract with a customer (marriage), then your program (life) is going to be facing new situations you never expected. You'll be forced to patch the code (admit you're wrong) and then the code (wife) will just end up all bloated and unmaintainable in the end.

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Hi,

You need to compare the vars type in this case with VarGetType, or if you already know the type e.g IsNumber.

Br, FireFox.


 

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Ok, that makes a little more sense.  Thank you for your help!


Dating a girl is just like writing software. Everything's going to work just fine in the testing lab (dating), but as soon as you have contract with a customer (marriage), then your program (life) is going to be facing new situations you never expected. You'll be forced to patch the code (admit you're wrong) and then the code (wife) will just end up all bloated and unmaintainable in the end.

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One more possibility between "just declared" and set to either 0 or empty string: explicitely initialize your variable(s) to Null. Requires recent enough AutoIt.


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