Compare two version strings

[tampe125]

Hi everyone,

I have to walk an array filled with version numbers and I have to find the highest one.

For example I could have

[0] => "1.0.1.4"

[1] => "1.2.0.12"

[2] => "5.0.85"

[3] => "4.6.3.23"

Using the example before, the highest one should be number 2 (5.0.85).

Is there anything like PHP version_compare function?

Thanks in advance!

[water]

This works if every part of the version number consists of 1 or 2 numbers.

Global $aVersions[4] = ["1.0.1.4", "1.2.0.12", "5.0.85", "4.6.3.23"]
Global $sResult = "00000000"
For $i = 0 to UBound($aVersions,1) - 1
    $aTemp = StringSplit($aVersions[$i] & ".0.0.0", ".", 2)
    $aString = StringFormat("%02s", $aTemp[0]) & StringFormat("%02s", $aTemp[1]) & StringFormat("%02s", $aTemp[2]) & StringFormat("%02s", $aTemp[3])
    If $aString > $sResult Then $sResult = $aString
Next
ConsoleWrite("Highest version number is: " & StringLeft($sResult, 2) & "." & StringMid($sResult, 3, 2) & "." & StringMid($sResult, 5, 2) & "." & StringMid($sResult, 7, 2) & @LF)

[BrewManNH]

Another way to skin the cat.

#include <Misc.au3>
Global $aVersions[4] = ["1.0.1.4", "1.2.0.12", "5.0.85", "4.6.3.23"]
Global $sResult = "00000000"
For $i = 0 To UBound($aVersions) - 1
     If _VersionCompare($aVersions[$i], $sResult) > 0 Then $sResult = String($aVersions[$i])
Next
ConsoleWrite("Highest version number is: " & $sResult & @CRLF)

[water]

Oh! Learned something new today!

Didn't know _VersionCompare. Much easier than my example.

[BrewManNH]

I ran across the function one day a long time ago, I've never used it before this though.

[Malkey]

This works if every part of the version number consists of 1 or 2 numbers.

Global $aVersions[4] = ["1.0.1.4", "1.2.0.12", "5.0.85", "4.6.3.23"]
Global $sResult = "00000000"
For $i = 0 to UBound($aVersions,1) - 1
$aTemp = StringSplit($aVersions[$i] & ".0.0.0", ".", 2)
$aString = StringFormat("%02s", $aTemp[0]) & StringFormat("%02s", $aTemp[1]) & StringFormat("%02s", $aTemp[2]) & StringFormat("%02s", $aTemp[3])
If $aString > $sResult Then $sResult = $aString
Next
ConsoleWrite("Highest version number is: " & StringLeft($sResult, 2) & "." & StringMid($sResult, 3, 2) & "." & StringMid($sResult, 5, 2) & "." & StringMid($sResult, 7, 2) & @LF)

It's a personal choice - 4 bad, 1 good - today.

Four (4) StringFormat functions work:-
$aString = StringFormat("%02s", $aTemp[0]) & StringFormat("%02s", $aTemp[1]) & StringFormat("%02s", $aTemp[2]) & StringFormat("%02s", $aTemp[3])

; and

;one (1) StringFormat function works:-
$aString = StringFormat("%02s%02s%02s%02s", $aTemp[0], $aTemp[1], $aTemp[2], $aTemp[3])

Edited February 5, 2013 by Malkey

[water]

As BrewManNH stated above: There are many ways to skin a cat

[JohnQSmith]

As BrewManNH stated above: There are many ways to skin a cat

Is there a recommended method?

[water]

Both work. So I think it's your choice.

Select the method you still can understand in 3 months

[BrewManNH]

The recommended method is the one that works for you in the script you're writing.

[JohnQSmith]

I meant for "skinning a cat".

[water]

Here you can find a few approaches. Select the one you like most

[kylomas]

Here you can find a few approaches. Select the one you like most

Thanks, water, thre's coffee all over the desk from laughing so hard

[water]

It's amazing what Google returns when you enter the "correct" search words

[JohnQSmith]

So after reading those and omitting all the superfluous activities, it turns out there is only one way which is summarized in steps II and III in "The Direct Approach".

Edited February 6, 2013 by JohnQSmith

[water]

I'm sure you can omit step I but I'm also sure this will be "harmful to your health"