Jump to content
Sign in to follow this  

Interesting Array Warnings

Recommended Posts


#include <File.au3>

Local $String, $Array, $Max

$String = FileReadLine(@ScriptDir & "\Data.txt", 1)
$Array = StringSplit($String, ".")
$Max = UBound($Array)

For $i = 1 To $Max Step +1
    MsgBox(0, "", $Array[$i])

So i spotted this in the console

C:\Users\Scott\Documents\AutoIt\Arrays\Hmm.au3 (10) : ==> Array variable has incorrect number of subscripts or subscript dimension range exceeded.:
MsgBox(0, "", $Array[$i])
MsgBox(0, "", ^ ERROR

Obviously it's not the end of the world, the script still runs fine, just curious about this.

Share this post

Link to post
Share on other sites


Ah, this old chestnut again! :huggles:

Arrays in AutoIt start at element [0], so a 5 element array has [0], [1], [2], [3], [4]

UBound, on the other hand, gives you the total number of elements, a 5 element array will return 5.

Can you see where this is going yet? :D

You have set your For...Next loop as 1 To $Max - when it should be 0 To $Max - 1.

I know your first reaction will be: "Why the hell does UBound return 5!" - you are not alone! However, you are warned - from the Help file for UBound: "Remember that the value returned by UBound is one greater than the index of an array's last element!". Personally I would have called UBound something else, like NumElements, but then I did not write it. If it is any consolation, I still have to think very carefully about the upper and lower limits of array elements and often get my For...Next counter wrong on the first pass. :D

You might find this topic of interest if you want to see a bit more confusion...... :


Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


Share this post

Link to post
Share on other sites

For $i = 0 to $Max -1

You skipped the [0] element, not unless that was intentional.

Also, You don't need to specify the step as being +1. It is +1 by default. You only use Step when you need a different Step value.

Share this post

Link to post
Share on other sites

Yeah I remember reading that, so should this work?

Would you like someone else to test the script for you?? ... by the way - with icecream on top or without?

SNMP_UDF ... for SNMPv1 and v2c so far, GetBulk and a new example script

wannabe "Unbeatable" Tic-Tac-Toe

Paper-Scissor-Rock ... try to beat it anyway :)

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this