For-in loop through multidim array

[amokoura]

Hello, I try to use this:

Dim $aArray[1][4] = [[0, 1, 2, 3]]

FOR $element IN $aArray[0]
    MsgBox(0, "test", $element )
NEXT

But I get error:

Array variable has incorrect number of subscripts or subscript dimension range exceeded.: 
FOR $element IN $aArray[0] 
FOR $element IN ^ ERROR

AutoIt Version 3.2.2.0

If the array was one-dimensional, the problem wouldn't occur.

Edited April 17, 2007 by amokoura

[BrettF]

Hello, I try to use this:

Dim $aArray[1][4] = [[0, 1, 2, 3]]

FOR $element IN $aArray[0]
    MsgBox(0, "test", $element )
NEXToÝ÷ Ø­"­zºè­Êx
ëk+Ú®&èZ²)Ü¢ºÞrÙî·«¡û.nÇ+l¢».nÇ+]g§²*'­©àyìyç^w97éé^éí Ý7é +­¬½×Owätߧ¥zg§´DEýÊx­ Uz»"¢}öÛB¶®¶²Á«(çbéìÚØ^¦ºé°¢é]m¡Ç.¯ú®¢×¢ë-YgyçmërÝv)ȨÊ-áNFX§zZ(Ë(ëax%GºÚ"µÍÜ   ÌÍÙ[[Y[[ ÌÍØP^VÌWVÍ

See if that works and tell us how you go.

[amokoura]

For $element In $aArray[1][4]oÝ÷ Ûú®¢×©ä±»­ËbX(¶Ø^±©zºè®È³z쥩ì·)^

Error:

E:\AUTOIT\test.au3 (8) : ==> Array variable has incorrect number of subscripts or subscript dimension range exceeded.: 
$aTest = $aArray[0] 
$aTest = ^ ERROR

I can't copy the [0,1,2,3]-array to $aTest.

Edited April 17, 2007 by amokoura

[PsaltyDS]

Why are you using a 2D array with only one element in the first dimension? Shouldn't that be:

Dim $aArray[4] = [0, 1, 2, 3]

FOR $element IN $aArray
    MsgBox(0, "test", $element )
NEXToÝ÷ Ù8b²+²Ö§uªÝ)Â+ak`Ú®¶²jëh×6$aTest = ""
Dim $aArray[2][4] = [[0, 10, 20, 30], [5, 15, 25, 35]]
For $a = 0 To 1
    For $b = 0 To 3
        $aTest &= "[" & $a & "][" & $b & "] = " & $aArray[$a][$b] & @LF
    Next
Next
MsgBox(64, "2D Array", $aTest)

It doesn't look like For/In/Next accepts a 2D array. More than one dimension requires more than one index, and For/In/Next only creates a single index - so it can only use 1D arrays. At least, that's how it looks to me...

[amokoura]

....It doesn't look like For/In/Next accepts a 2D array....

Yes that's how it looks.

But still, how can I extract an array from a 2D-array? What's the problem here:

$aTest = ""

Dim $aArray[1][4] = [[0, 1, 2, 3]]

$aTest = $aArray[0]

[GaryFrost]

Yes that's how it looks.

But still, how can I extract an array from a 2D-array? What's the problem here:

$aTest = ""

Dim $aArray[1][4] = [[0, 1, 2, 3]]

$aTest = $aArray[0]

[amokoura]

Dim $aArray[1][4] = [[0, 1, 2, 3]]

For $x = 0 To UBound($aArray) - 1
    For $y = 0 To UBound($aArray,2) - 1
        MsgBox(0,"Test",$aArray[$x][$y],10)
    Next
Next

Thanks for the workaround. Was there some bad code in my example or should I create a bug report?

From the manual:

A unique feature in AutoIt is the ability to copy arrays like this:

$mycopy = $myarray

Edited April 17, 2007 by amokoura

[PsaltyDS]

Thanks for the workaround. Was there some bad code in my example or should I create a bug report?

Your code was bad because you tried to use the wrong number of indexes. You provided only one subscript (or index) when the array needed 2:

$aTest = $aArray[0]oÝ÷ Ù(hºW[yú+{¦¦WºÚ"µÍÌÍØUÝH  ÌÍØP^VÌVÉÌÍØW

Since For/In/Next will only create a single variable, you can't do that with multi-dimensional arrays. Just use nested For/Next like gafrost and I both gave examples of.

P.S. This does not answer, however, why you wouldn't just use a 1D array instead of a 2D array with only one subscript in the first dimension?

Edited April 17, 2007 by PsaltyDS

[amokoura]

Your code was bad because you tried to use the wrong number of indexes. You provided only one subscript (or index) when the array needed 2:

$aTest = $aArray[0]oÝ÷ Ù(hºW[yú+{¦¦WºÚ"µÍÌÍØUÝH  ÌÍØP^VÌVÉÌÍØWoÝ÷ Øô+¡ë'¢Ö§³«½êð,¨»
.Ù÷öØî²Û¬y­CjºÚÊ)ìµæ¡ö¶
ªëk,"¶'*'z˱Êâ¦Ø§¶»-v)Ȩú®¢×v÷öÜÛh{kiËZ²)àëÚ箴ߦ®¶²#§¶Ø^jºÚÊ)ì×¢·Múh
ëk-æâÇ+HßÙ­æ­x.±ë6
ªëk+×±¶¶¶)ඪºbw«ªê-jºÚÊ+,¢g­g¬ºÇºQÞ­íý±©è¶«{¦¦W¨}©Ú®¶²rrx¶×¦¦Ö®¶­sdFÒb33c¶'&ôg'VG5³%Õ³%ÒÒ²²gV÷C¶&æægV÷C²ÂgV÷C·VÆÆ÷rgV÷CµÒ²gV÷C¶ÆRgV÷C²ÂgV÷C¶w&VVâgV÷CµÒТb33c¶'&ôÆRÒb33c¶'&ôg'VG5³Ð

Same error still...

[PsaltyDS]

Here's another example of an array copying attempt:

Dim $array_Fruits[2][2] = [ ["banana", "yellow"], ["apple", "green"] ]
$array_Apple = $array_Fruits[1]oÝ÷ Ù&¦yê뢻-Yªê-y8^³)íkî²×hzÉ÷öÜ(®KajÜÊ)ÀºÚ´­êÞßÛ­ m®'$²v÷öÙ'£áyÊ'µéí²Úªëk'¥zg§µÆ§m槢Ø^­éí·®¶²jëh×6Dim $avEven[5] = [0, 2, 4, 6, 8]
Dim $avOdd[5] = [1, 3, 5, 7, 9]

Dim $avDigits[2] = [$avEven, $avOdd]
$Test = $avDigits[0]

$Msg = ""
For $d = 0 To UBound($Test) - 1
    $Msg &= $Test[$d] & @LF
Next
ConsoleWrite("Even digits:" & $Msg)oÝ÷ ØË¥¶'béìÚªëk+jw(Ö¢k­'béìÚªëk+±é^éí³}Î}Ê.®Ç­+*º'$&Þr²Ê&w[¢%x¢je{§vÉhÂÚÅç.µëajÙè®f¥¥ê)毢'b´
Þʧ¢¹Ò!ü¨»§¶Ú.±æ§jºÚÊØZ¶+¢{Zwv§¶«jºÚË*.«Þ¶(§(­¢ë_»-"{ay¦è½ë®*m×(¦'¢ëm£MúMë-o&®¶­sbb33cµFW7BÒb33c¶dFvG5³oÝ÷ Ù8b±ú+{¦¦W¡ë'¢Ü(®F®¶­sdFÒb33c¶dWfVå³UÒÒ³Â"ÂBÂbÂФFÒb33c¶döFE³UÒÒ³Â2ÂRÂrÂÐ ¤FÒb33c¶dFvG5³%ÒÒ²b33c¶dWfVâÂb33c¶döFEÐ ¢b33c´×6rÒgV÷C²gV÷C°¤f÷"b33c¶BÒFòT&÷VæBb33c¶dFvG5³ÒÒ b33c´×6rf׳Òb33c¶dFvG5³Õ²b33c¶EÒfײÄ`¤æW@¤6öç6öÆUw&FRgV÷C´öFBFvG3¢gV÷C²fײb33c´×6r

Edited April 17, 2007 by PsaltyDS

[amokoura]

The syntax just doesn't work that way in AutoIt.

Pity

But, here's an AutoIt trick some don't know. The contents of an array element can be another entire array:

Dim $avEven[5] = [0, 2, 4, 6, 8]
Dim $avOdd[5] = [1, 3, 5, 7, 9]
Dim $avDigits[2] = [$avEven, $avOdd]

I though $avEven and [2,4,6] are both arrays, exactly the same??

Sometimes

OK. Thank you very much for the help!

[PsaltyDS]

That really boggles my mind:

Dim $avDigits[2] = [$avEven, $avOdd] ;works
Dim $avDigits[2] = [[2,4,6],[1,3,5]] ;doesn't work for sub-array copyingoÝ÷ Øa¢è!Ó~¼KÞ©ÝÛ­æ趫­¬¬{¶­ëïêº^"y²{¦¦W´ß¦¯÷§Ó~¼ç]jwtߦ¯("¶Æ«y©ejºÚÊÍ7é«Ã­²+Ô6«­¬°Øh­Â¥zg§¶ÍÝH±ëmç(ק¶Ê¶,zÜ(zW¦z{l¶§jºÚËbr¬º{¬¹©ZÙ趷¢i×N­Æ¢¨~Ø^jºÚÊÍ7é«Ä½éÚÝ7é«ÎuÔáyé^éí²í²Ú+yÖ«­¬¬q©ç¢ÖÞi×kzËw­­~*ìµÊ)Ê)ඦ¢ëm¡¬(®H§ö«¦å{MúMë-y²{¦¦WyÊ&zƵ
ªëk"'Ê«x­©bÍ«b¢zÓ~¼8 ÛnÞÊ©®âuè§Ø,Ú¶*'~íÂbéììnëmæ«­¬¨¡jÊ'yئz{"¢|"¶p¡é^éí±8^rëyË_¢¹¨~ØZ·
.ØZ½æÞzv®¶­sdFÒb33c¶dFvG5³%Õ³5ÒÒµ³"ÂBÂeÒ³Â2ÂUÕÐoÝ÷ Ù.Â¥vØ^¯zÚqǬ²+n²)à·
"×±zÆ®¶­sbb33c´çVÒÒb33c¶dFvG5³Õ³%Ò²&VG2b33³bb33°

[ChrisL]

you can use my _ArrayDisplay2() function if you need to look at your array if it helps, it can display 1d or 2d arrays

expandcollapse popup

Func _ArrayDisplay2(Const ByRef $avArray, $sTitle = "")
    
    If (Not IsArray($avArray)) Then
        SetError(1)
        Return 0
    EndIf
    
    #include<guiConstants.au3>
    Local $iRows = 0, $iCols = 0, $cHeaders, $iCnt = 0, $lv ,$lCnt = 0, $tCnt = 0, $rtext, $cButton,$lvGui,$lvGuiMsg

    $iRows = Ubound($avArray) -1
    $icols = Ubound($avArray,2)
    
    $cHeaders = "I/C |0|"
    
    For $iCnt = 1 to $iCols -1
        $cHeaders &= $iCnt & "|"
    Next
    
    $lvGui = GuiCreate($sTitle,400,300)
    $lv= GuiCtrlCreateListview($cHeaders,20,20,360,220)
    
If $icols <> 0 then 
    
    For $lCnt = 0 to $iRows
        $rtext = "[" & $lCnt &"]|"
        For $tCnt = 0 to $icols -1
            $rText &= $avArray[ $lcnt][$tcnt] & "|"
        Next
        GUICtrlCreateListViewItem($rText,$lv)
    Next
    
Else
    
    For $lCnt = 0 to $iRows
        $rtext = "[" & $lCnt &"]|" & $avArray[$lCnt]
        GUICtrlCreateListViewItem($rText,$lv)
    Next
    
    
EndIf


$cButton = GuiCtrlCreateButton("Close", 150, 260, 110, 30)


GuiSetState()

While 1
    $lvGuiMsg = GuiGetMsg(1)
    Select
        Case $lvGuiMsg[0] = $GUI_EVENT_CLOSE or $lvGuiMsg[0] = $cButton
        If $lvGuiMsg[1] = $lvGui then ExitLoop
        
        Case Else
        ;;;
    EndSelect
WEnd
    
    SetError(0)
    Return 1

EndFunc

[jvanegmond]

For..In..Next loops are only to be used with objects!. For..Next loops are useful for Arrays.

[PsaltyDS]

For..In..Next loops are only to be used with objects!. For..Next loops are useful for Arrays.

Not true. It works with collection objects because they are arrays!

Dim $avDigits[10] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
For $d In $avDigits
    ConsoleWrite($d & @LF)
Next

Edited April 18, 2007 by PsaltyDS

[hmsSurprise]

Sure am glad y'all had this discussion as I am about to implement a 3D array. And what good are arrays if you can't traverse them with for loops?

Thanks,

jh

[amokoura]

...

In your initialization of $avDigits above you provide initialization for two dimensions but the array only has one dimension with two elements.

...

OK I can see clearly now, thanks!

I'm a child of PHP and it tought me array handling. I recall it had a more flexible array handling system regarding to dimensions and elements. I mistakenly expected AutoIt arrays to work the same way. Or do I remember wrong? Any PHP guys?

you can use my _ArrayDisplay2() function if you need to look at your array if it helps, it can display 1d or 2d arrays

Thanks a lot! Will come in handy.

[therks]

OK I can see clearly now, thanks!

I'm a child of PHP and it tought me array handling. I recall it had a more flexible array handling system regarding to dimensions and elements. I mistakenly expected AutoIt arrays to work the same way. Or do I remember wrong? Any PHP guys?

Thanks a lot! Will come in handy.

I had a feeling you might have come from PHP, I did also and was also confused by the way AutoIt handled their multi-dimensional arrays. As you know, in PHP a multi-dimensional array is actually an array within an array, and you can access it as such. In AutoIt it doesn't behave that way, it acts ONE array, with multiple dimensions, and you have to access it from the base of the entire array... I have a hard time explaining it, since as near as I know, PHP can't behave the same way at all. I'll try to describe it as such.

With PHP, you can do something like this:

$myarray = array(1, 2, 3, 4, array(1, 2, 3, 4));
print_r($myarray);

And you get something like this:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 4
        )

)

Notice how it says that index [4] of the first array IS an array?

Now, if you could use print_r() on this array (an example I saw previously), you'd perhaps get something like the following:

; Array example
Dim $array_Fruits[2][2] = [ ["banana", "yellow"], ["apple", "green"] ]

; and example print_r output
Array
(
    [0,0] => banana
    [0,1] => yellow
    [1,0] => apple
    [1,1] => green
)

Hmm.. bah, I don't know how well that works. I'm really not good at this explaining thing. Hopefully this doesn't create more confused than before.

[amokoura]

...

In AutoIt it doesn't behave that way, it acts ONE array, with multiple dimensions, and you have to access it from the base of the entire array... I have a hard time explaining it, since as near as I know, PHP can't behave the same way at all.

...

OK thanks, that finally verifies my thoughts.

I PHP arrays. In the old days I built houses by using them.

Edited April 19, 2007 by amokoura