Is there a way to increment an array using addition?

[PartyPooper]

I was wondering if there was a simple way to increment an array using addition assignment (ie. +=)

I know you can use $aArray[$n + 1] but how do I go about using $aArray[$n += 1] without throwing an error?

Essentially, I want something like this:

$aArray[$n += 1] = "Item 1"
$aArray[$n += 1] = "Item 2"
$aArray[$n += 1] = "Item 3"
...

I guess I could have:

$n += 1
$aArray[$n] = "Item 1"
$n += 1
$aArray[$n] = "Item 2"
$n += 1
$aArray[$n] = "Item 3"
...

but that's a little long-winded so I'm wondering if there's some quicker/easier method.

[AdmiralAlkex]

Are you saying that you want to resize the array (ReDim) or a For-loop without the For-loop (just weird)?

Why don't you use a For-loop?

Global $avArray[3]=["first", "second", "third"]

For $iX = 0 To UBound($avArray) -1
    ConsoleWrite($avArray[$iX] & @CRLF)
Next

Edit: Or you are saying StringSplit()?

Global $sSomething = "first|second|third"

Global $avArray = StringSplit($sSomething, "|")

For $iX = 1 To $avArray[0]
    ConsoleWrite($avArray[$iX] & @CRLF)
Next

Edited July 9, 2011 by AdmiralAlkex

[jaberwacky]

Global $aArray[3]

Global $n = -1

$aArray[increment($n)] = "Item 1"

$aArray[increment($n)] = "Item 2"

$aArray[increment($n)] = "Item 3"

Func increment(ByRef $var)
    $var += 1
    Return $var
EndFunc

Better yet:

Global $aArray[3]

$aArray[increment()] = "Item 1"

$aArray[increment()] = "Item 2"

$aArray[increment()] = "Item 3"

Func increment()
    Local Static $var = -1
    $var += 1
    Return $var
EndFunc

Edited July 10, 2011 by LaCastiglione

[PartyPooper]

Thanks guys, both answers solve the problem in slightly different ways which is great. Now I just have to make up my mind which would be easier for me in the long run

[jaberwacky]

Probably Admiral 'Man Hair' Alkex's solutions are the most maintainable.

[AdmiralAlkex]

Probably Admiral 'Man Hair' Alkex's solutions are the most maintainable.

OMG, I'm sooo changing my name to that!

[wolf9228]

I was wondering if there was a simple way to increment an array using addition assignment (ie. +=)

I know you can use $aArray[$n + 1] but how do I go about using $aArray[$n += 1] without throwing an error?

Essentially, I want something like this:

$aArray[$n += 1] = "Item 1"
$aArray[$n += 1] = "Item 2"
$aArray[$n += 1] = "Item 3"
...

I guess I could have:

$n += 1
$aArray[$n] = "Item 1"
$n += 1
$aArray[$n] = "Item 2"
$n += 1
$aArray[$n] = "Item 3"
...

but that's a little long-winded so I'm wondering if there's some quicker/easier method.

#include <Array.au3>


Dim $YArray1D[1]
$YArray1D[0] = 1
AddNewElement($YArray1D,2)
AddNewElement($YArray1D,3)
AddNewElement($YArray1D,4)
AddNewElement($YArray1D,5)
AddNewElement($YArray1D,6)
AddNewElement($YArray1D,7)
AddNewElement($YArray1D,8)
AddNewElement($YArray1D,9)
AddNewElement($YArray1D,10)
_ArrayDisplay($YArray1D,"YArray1D")

Dim $XArray1D[1]
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
_ArrayDisplay($XArray1D,"XArray1D")

Func AddNewElement(ByRef $aArray1D,$value = "")
if Not IsArray($aArray1D) Or UBound($aArray1D, 0) = 2 Then Return SetError(1,0,0)
$rows = UBound($aArray1D)
ReDim $aArray1D[$rows + 1]
$aArray1D[$rows] = $value
Return SetError(0,0,$rows)
EndFunc

[wolf9228]

Or

expandcollapse popup

#include <Array.au3>

Dim $YArray1D = 0
AddNewElement($YArray1D,1)
AddNewElement($YArray1D,2)
AddNewElement($YArray1D,3)
AddNewElement($YArray1D,4)
AddNewElement($YArray1D,5)
AddNewElement($YArray1D,6)
AddNewElement($YArray1D,7)
AddNewElement($YArray1D,8)
AddNewElement($YArray1D,9)
AddNewElement($YArray1D,10)
_ArrayDisplay($YArray1D,"YArray1D")

Dim $XArray1D = 0
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
AddNewElement($XArray1D)
_ArrayDisplay($XArray1D,"XArray1D")

Func AddNewElement(ByRef $aArray1D,$value = "")
if UBound($aArray1D, 0) = 2 Then Return SetError(1,0,0)
if Not IsArray($aArray1D) Then
Dim $TempArray[1]
$aArray1D = $TempArray
$aArray1D[0] = $value
Return SetError(0,0,0)
Else
$rows = UBound($aArray1D)
ReDim $aArray1D[$rows + 1]
$aArray1D[$rows] = $value
Return SetError(0,0,$rows)
EndIf
EndFunc

[jaberwacky]

Yeah? Well how about this?

expandcollapse popup

#include <Array.au3>
#include "AutoItObject.au3"

_AutoItObject_StartUp()

Global $array = Array()

$array.Add("Item 1")

$array.Add("Item 2")

$array.Add("Item 3")

$array.Display()

Func array()
    Local $this = _AutoItObject_Class()

    $this.AddProperty("Array", $elscope_private, '')
    $this.AddProperty("Size",  $elscope_private, 0)

    $this.AddMethod("Grow", "array_grow", True)

    $this.AddMethod("Add",  "array_add")
    $this.AddMethod("Display", "array_display")
    $this.AddMethod("GetSize", "array_get_size")

    Return $this.Object
EndFunc

Func array_add($this, Const $item)
    $this.Grow()
    Local $array = $this.Array
    $array[$this.Size - 1] = $item
    $this.Array = $array
EndFunc

Func array_grow($this)
    Local $array = $this.Array

    If $this.Size = 0 Then
        Dim $array[1]
    Else
        ReDim $array[$this.Size + 1]
    EndIf

    $this.Size = $this.Size + 1
    $this.Array = $array
EndFunc

Func array_display($this)
    Local $array = $this.Array
    Local Const $size = $this.Size - 1

    For $i = 0 To $size
        ConsoleWrite("$array: " & $array[$i] & @LF)
    Next
EndFunc

Edited July 11, 2011 by LaCastiglione

[AdmiralAlkex]

@LaCastiglione

Redim +1 will be horribly slow, you should Redim *2

[guinness]

This is how I use ReDim -

[PartyPooper]

Actually in this case, LaCastiglione's first post was the one I ended up going with as it made more sense and was easier/quicker to code up. Cheers for that.