Array limitations

[Phaser]

Hi everyone

I am trying to find a way of adding data to an array (array push) the problem I have is I don't want to set the size [??] of the array, in php I would just set the array as, arrayname() and push data to it so it grows as much as is needed, I can't find a way to do that with autoit, any ideas?

I know I can set it to something like arrayname[1000] but then I will have loads of empty values

Thanks in advance

[jvanegmond]

Just set the array to a size of 1, from then on ignore the first element in your loops.

PHP is a little dirtier than AutoIt.

Edit: The function to push into an array is _ArrayPush() (see help file). Alternative is using ReDim keyword to resize the array (_ArrayPush method does this for you).

Edited August 28, 2009 by Manadar

[Phaser]

Thanks Manadar but it doesn't work??

Local $list[1]

_ArrayPush($list, $thedata, 1)
_ArrayDisplay($list, "AFTER _ArrayPush()")

only shows one entry each time, it does change with the data but only replaces the 1 element

Any ideas?

[jvanegmond]

Sorry, the function _ArrayPush does not resize the array. The function I had in mind was _ArrayAdd.

#include <Array.au3>

Dim $thedata = "IM DOING IT RONG :("
Local $list[1]

_ArrayAdd($list, $thedata)
_ArrayAdd($list, $thedata)
_ArrayAdd($list, $thedata)
_ArrayDisplay($list, "AFTER _ArrayPush()")

Please provide a full ready-to-run example next time.

[Phaser]

Please provide a full ready-to-run example next time.

sorry

ok that does work, I understand ignore the first element while looping, only thing now is I need to reverse the array as the data is in the wrong direction, will use _ArrayReverse now, cheers mate

[jvanegmond]

Some insights for the future, maybe.

#include <Array.au3>

Local $list[1] = [0]

__ArrayPush($list, 1)
__ArrayPush($list, 2)
__ArrayPush($list, 3)
_ArrayDisplay($list, "AFTER _ArrayPush()")

Func __ArrayPush(ByRef $avArray, $vValue)
    If (Not IsArray($avArray)) Then Return SetError(1, 0, 0)
    If UBound($avArray, 0) <> 1 Then Return SetError(3, 0, 0)
    Local $iUBound = UBound($avArray)
    ReDim $avArray[$iUBound+1]

    For $i = $iUBound To 1 Step -1
        $avArray[$i] = $avArray[$i - 1]
    Next
    
    $avArray[0] = $vValue

    Return 1
EndFunc   ;==> __ArrayPush

Edited August 28, 2009 by Manadar

[Nutster]

Please keep in mind that the ReDim keyword copies the entire array as it resizes, so you may want to do this as infrequently as possible, otherwise this can be very slow for big arrays. I would suggest that you size the array once with your best guess of how much space you will need and then only redim if you run out of space. Use a second variable to keep track of how many elements are in use.

Local $aList[99]      ; estimating that I need up to 99 elements.
Local $nListPos = -1  ; What is the last element I have used?  -1 means that no elements are used.
Local $sInput         ; Used to store input values.
Local $I              ; Loop control variable
Local $sDisplay       ; Used to accumulate values to be displayed.

While True
   $sInput = InputBox("Please enter a value.", "Testing", "", " M")
   If @Error = 1 Then ExitLoop
   
   For $I = 0 To $nListPos
       If $aList[$I] = $sInput Then
           ExitLoop
       EndIf
   Next

   If $I > $nListPos Then
       ; Entered string on in the array.  Add it.
       $nListPos += 1
       If $nListPos >= UBound($aList) Then ReDim $aList[$nListPos + 9]  ; Grow the array, but a few at a time, to reduce the number of resizes.
       $aList[$nListPos] = $sInput
   Else
       ; Found the element with the entered value in the array.  Remove it.
       If $I < $nListPos Then
           ; Copy the last element over this element, if not the last element.
           $aList[$I] = $aList[$nListPos]
       EndIf
       $nListPos -= 1    ; Decrease the active count by one.
   EndIf
Wend

$sDisplay = ""
For $I = 0 To $nListPos
   $sDisplay &= $aList[$I] & @cr
Next
MsgBox(0, "Testing", $sDisplay

[Phaser]

Hu Guys

Thanks for the help so far, I have just encountered a new problem, I am using

#include <Array.au3>

Local $list[100][6]

;test to see if the array exists, it does and returns expected values

If IsArray($vars) Then
MsgBox(0, "array of data", $vars[3])
EndIf

_ArrayPush($list, $vars); vars is an array of 6 components

; test to see if data was added

If IsArray($list) Then
MsgBox(0, "array of data", $list[3])
EndIf

I get the error

"Array variable has incorrect number of subscripts or subscript dimension range exceeded"

I haven't found a solution yet, any ideas where to look, do I have it all setup correclty?

[WolfWorld]

Hu Guys

Thanks for the help so far, I have just encountered a new problem, I am using

#include <Array.au3>

Local $list[100][6]

;test to see if the array exists, it does and returns expected values

If IsArray($vars) Then
MsgBox(0, "array of data", $vars[3])
EndIf

_ArrayPush($list, $vars); vars is an array of 6 components

; test to see if data was added

If IsArray($list) Then
MsgBox(0, "array of data", $list[3])
EndIf

I get the error

"Array variable has incorrect number of subscripts or subscript dimension range exceeded"

I haven't found a solution yet, any ideas where to look, do I have it all setup correclty?

Most the whole script.

[Phaser]

hi athiwatc, its not really possible to post the full script as theres many include files, what I really need to know is, is the way I have everything correct, this line

Local $list[100][6]

Is the 6 correct? I have 6 seperate variables to put in to the array, is this correct to perform that job?

_ArrayPush($list, $vars)

Hopefully someone can see the issue

[jvanegmond]

As far as I know, _ArrayPush only handles 1D arrays.

Try this: ( adapted from your code, so you'll have to "adapt" it back. )

#include <Array.au3>

Local $list[100]

;test to see if the array exists, it does and returns expected values

If IsArray($vars) Then
MsgBox(0, "array of data", $vars[3])
EndIf

_ArrayPush($list, $vars); vars is an array of 6 components

; test to see if data was added

If IsArray($list) Then
MsgBox(0, "array of data", $list[3])
EndIf

[WolfWorld]

hi athiwatc, its not really possible to post the full script as theres many include files, what I really need to know is, is the way I have everything correct, this line

Local $list[100][6]

Is the 6 correct? I have 6 seperate variables to put in to the array, is this correct to perform that job?

_ArrayPush($list, $vars)

Hopefully someone can see the issue

It can't push the second block (The [6])

So you will need to fix this, by using the code by @ Manadar which is above me.

Edited August 28, 2009 by athiwatc

[Phaser]

It can't push the second block (The [6])

So you will need to fix this,

I agree, but how?

I only see this change

Local $list[100]

This doesn't help as it still wont push all the data, is there another method I can use if arraypush wont do it?

From the manual for arraypush

$vValue Value(s) to add (can be in an array)

Edited August 28, 2009 by Phaser

[jvanegmond]

Can you give us a bit more information to work with? You're currently a little bit like this:

------------------------
|       = Box =        |
|                      |         ?                    ?
|                      |      ?       Nutster
|       Phaser         |            Manadar          ? 
|                      |       ?          athiwatc  ? 
------------------------

[Phaser]

I'm trying my best guys, honest, if I call all variables here

If IsArray($vars) Then
MsgBox(0, "array of data", $vars[0] & $vars[1] & $vars[2] & $vars[3] & $vars[4] & $vars[5])
EndIf

Everything shows up perfect, I just need to use that data to create the 2 D $list array

[Nutster]

An array is a way to store a group of variables by using one storage name to access them. The array size is how many variables (values, etc) that you want to store. Store 5 things try,

Local $aList[5]

You can initialize those five, that is given them initial values.

Local $aList[5] = [5, 42, 3.1415962452, "String", 0xAb1e]

This array contains 5 elements, with index numbers ranging from 0 to 4. This would be the same as writing the following, but much shorter, and a little bit faster.

Local $aList[5]
$aList[0] = 5
$aList[1] = 42
$aList[2] = 3.1415962452
$aList[3] = "String"
$aList[4] = 0xAb1e

The IsArray function just tells you whether this variable is an array. Use UBound($a, 0) to determine the number of dimensions in an array, that is the number of directions of data. A one-dimensional array can be thought of as a list. A two-dimensional array looks more like a chess board, with rows and columns. A three-dimensional array looks more like an Excel workbook, with sheets, rows and columns. You could think it like a book instead; find the page, line and word number in a particular book. 4-dimensional arrays and more dimensional arrays get hard to physically model without using quantum mechanics. Each dimension gives you more directions in which to store information.

Are you sure you need to dimensions? What do the two dimensions represent? In one array I created, the first dimension was vehicle type, the second with vehicle model within the type, the third dimension was what type of component, and the fourth dimension was what measure of the part. So $a[1][0][3][2] could have represented the price (2) of the engine (3) of a sub-compact (0) car (1). This array stored a lot of data.

You have one dimension already. What are you going to do with the second dimension?

[PartyPooper]

Please keep in mind that the ReDim keyword copies the entire array as it resizes, so you may want to do this as infrequently as possible, otherwise this can be very slow for big arrays.

Yes, I've found this too. I have an array with over 500,000 records and it becomes a real PITA to use _ArrayAdd with it. Haven't come up with a permanent solution as yet but I've found it quicker to dump the array to a text file, append the new data and then read it back into the array. I guess another solution may be to create a temporary array for the new data then concatenate it to the original.

[Phaser]

hi nutster, I understand array from using php, the array I am trying to create is multi dimensional (php) (2D in Autoit I think) heres a sample of the data and process to get that data, I was asking about OCR a few weeks back but have overcome that by 2 nested whiles, take a screen capturewnd to grab the image of the number then loop through each row of pixels to find the colour I need, this all works fine and returns the number, example

screenareagrab creates a barcode sort of number telling me how many green pixels per line which creates a number like 243354512 which I have already allocated to a specific number then returns

$thenumber = 47

$thenumber = yellow

$thenumber = square

etc

etc

etc

which I push into the array called $var, so $var contains 6 variables which i pass back and need to get them into the array called $list so i have a row of data like this

[] col0 col1 col3 col4 col5 col6

[1] 47 yellow square etc etc etc

[2] another set of data

etc

etc

HTH

[WolfWorld]

Can you give us a bit more information to work with? You're currently a little bit like this:

------------------------
|       = Box =        |
|                      |         ?                    ?
|                      |      ?       Nutster
|       Phaser         |            Manadar          ? 
|                      |       ?          athiwatc  ? 
------------------------

I find this to be funny(and of course now it's 2:21 AM right here)

[WolfWorld]

hi nutster, I understand array from using php, the array I am trying to create is multi dimensional (php) (2D in Autoit I think) heres a sample of the data and process to get that data, I was asking about OCR a few weeks back but have overcome that by 2 nested whiles, take a screen capturewnd to grab the image of the number then loop through each row of pixels to find the colour I need, this all works fine and returns the number, example

screenareagrab creates a barcode sort of number telling me how many green pixels per line which creates a number like 243354512 which I have already allocated to a specific number then returns

$thenumber = 47

$thenumber = yellow

$thenumber = square

etc

etc

etc

which I push into the array called $var, so $var contains 6 variables which i pass back and need to get them into the array called $list so i have a row of data like this

[] col0 col1 col3 col4 col5 col6

[1] 47 yellow square etc etc etc

[2] another set of data

etc

etc

HTH

This is easy, give me a hour. It's al,ost 2.30 am here