Error Initializing 5D Array

[barbossa]

Hi!

I was messing around with AutoIT, and found I can't initialize a 5D array. I re-checked the square brackets countless times, but AutoIT keeps returning "ERROR: wrong nesting in initializer". 4D arrays work fine.

Here is the example:

Local $arTestOk[2][2][2][2] = [[[[0,0],[0,0]],[[0,0],[0,0]]],[[[0,0],[0,0]],[[0,0],[0,0]]]]
Local $arTestBad[2][2][2][2][2] = [[[[[0,0],[0,0]],[[0,0],[0,0]]],[[[0,0],[0,0]],[[0,0],[0,0]]]],[[[[0,0],[0,0]],[[0,0],[0,0]]],[[[0,0],[0,0]],[[0,0],[0,0]]]]]

Is this a bug with AutoIT?

[water]

According to the documentation the maximum number of subscripts (dimensions) for an array is 64.

So there must be something wrong with the brackets.

[barbossa]

That is the problem: the brackets ARE correct.

Try running this:

Dim $arTest[1][1][1][1][1] = [[[[[1]]]]]

[Melba23]

barbossa,

Before I spend any time on this problem - does it have a real-world application or are you just playing about?

M23

[UEZ]

Beside that it is true that the brackets seems to be ok, how do you want to handle a 5D array?

Br,

UEZ

[BrewManNH]

Just letting you know, the brackets are probably fine, but you don't have enough numbers for a 5D array, you've only got sets of 0's, that's fine for a 4D array, but you're missing the 5th dimension.

[barbossa]

As I said in the first post, I was just playing around the possibility, I don't think it would have any practical application, and would definitely be horrendous to maintain.

BrewManNH, look at the 1-sized example I posted after. It has 5 dimensions, and holds only one value (the number of values would be 1^5 = 1). The first example has 32 zeros, filling the entire array (2^5 = 32).

[jdelaney]

Looks like you will need to do 4d arrays, nested with 2d arrays

edit, make that 1d arrays as the nested...hard to conceptualize

Local $arraySub[2] = [0, 1]
Local $arraySub2[2] = [2, 3]
Local $array[2][2][2][2] = [[[[$arraySub,$arraySub2],[$arraySub,$arraySub2]],[[$arraySub,$arraySub2],[$arraySub,$arraySub2]]],[[[$arraySub,$arraySub2],[$arraySub,$arraySub2]],[[$arraySub,$arraySub2],[$arraySub,$arraySub2]]]]
For $i = 0 To UBound($array) - 1
 For $j = 0 To UBound($array, 2) - 1
  For $k = 0 To UBound($array, 3) - 1
   For $l = 0 To UBound($array, 4) - 1
    $tempArray = $array[$i][$j][$k][$l]
    For $m = 0 To UBound($tempArray) - 1
     ConsoleWrite("$array[" & $i & "][" & $j & "][" & $k & "][" & $l & "].[" & $m & "] = " & $tempArray[$m] & @CRLF)
    Next
   Next
  Next
 Next
Next

output:

$array[0][0][0][0].[0] = 0

$array[0][0][0][0].[1] = 1

$array[0][0][0][1].[0] = 2

$array[0][0][0][1].[1] = 3

$array[0][0][1][0].[0] = 0

$array[0][0][1][0].[1] = 1

$array[0][0][1][1].[0] = 2

$array[0][0][1][1].[1] = 3

$array[0][1][0][0].[0] = 0

$array[0][1][0][0].[1] = 1

$array[0][1][0][1].[0] = 2

$array[0][1][0][1].[1] = 3

$array[0][1][1][0].[0] = 0

$array[0][1][1][0].[1] = 1

$array[0][1][1][1].[0] = 2

$array[0][1][1][1].[1] = 3

$array[1][0][0][0].[0] = 0

$array[1][0][0][0].[1] = 1

$array[1][0][0][1].[0] = 2

$array[1][0][0][1].[1] = 3

$array[1][0][1][0].[0] = 0

$array[1][0][1][0].[1] = 1

$array[1][0][1][1].[0] = 2

$array[1][0][1][1].[1] = 3

$array[1][1][0][0].[0] = 0

$array[1][1][0][0].[1] = 1

$array[1][1][0][1].[0] = 2

$array[1][1][0][1].[1] = 3

$array[1][1][1][0].[0] = 0

$array[1][1][1][0].[1] = 1

$array[1][1][1][1].[0] = 2

$array[1][1][1][1].[1] = 3

last modification...displaying the full fill

Edited April 19, 2013 by jdelaney

[Tekk]

AU3Check problem? It executes correct if you launch ouside of SciTE.

Local $arTestBad[2][2][2][2][2] = [[[[[0,0],[0,0]],[[0,0],[0,0]]],[[[0,0],[0,0]],[[0,0],[0,0]]]],[[[[0,0],[0,0]],[[0,0],[0,0]]],[[[0,0],[0,0]],[[0,0],[0,0]]]]]

$arTestBad[0][1][0][0][1] = Random(0, 100, 1)

MsgBox(0x40000, '5D Array', '$arTestBad[0][1][0][0][1] = ' & $arTestBad[0][1][0][0][1])

[BrewManNH]

I can't even imagine the use for a 5D array, but it's an interesting mind bender to get my head around the bracket and comma placements.

[barbossa]

Tekk,

probably that, tested it too and the compiled .exe worked fine...

jdelany,

well done!

[jchd]

I just checked and AutoIt will work correctly with 10D arrays and more, unless Au3Check is invoked and the explicitely initialized. So this is a an Au3Check bug.

In fact that post drew my attention on a point that escaped me until today, and probably devs themselves.

The doc says the maximum dimension of an array is 64 but in fact the actual maximum "non nonsense" dimension is much less:

Local $arTestBad[2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2]

is a valid 23D array declaration but adding one more dimension result in hitting another limit: the maximum size of an array:

"C:UsersjcDocumentsAutoMATTestNestedFor.au3" (7) : ==> Array maximum size exceeded.:

Local $arTestBad[2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2]

Local $arTestBad[2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][2][^ ERROR

Hence the maximum practical dimension of an array is 24, well, unless you use dummy dimensions like [1][1]... which don't bring you anything useful.

I'm openning two distinct trac tickets on these points.

As a [mathematically inclined] sidenote, a 24D object is enough to represent the Leech lattice, which makes this singular object appear once more in an area where it was not expected.

EDIT: I checked that 64 dimensions are actually the hard limit, albeit useless:

Local $arTestGood[1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1][1]

works but is likely to use L.I.S.P. (Lots of Insipide Square Parenthesis) uselessly!

Edited April 19, 2013 by jchd