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Quinch

Redefining variables within a For-To loop?

6 posts in this topic

What would be the best way to do it? I have a loop set up thusly -

Func Inet_Cleanup()
For $x = 1 To UBound($inet)-1
  $inet_info = InetGetInfo($inet[$x], -1)
  ;If the download was complete and successful
  If $inet_info[2] = True And $inet_info[3] = True Then
   InetClose($inet[$x])
   _ArrayDelete($inet, $x)
   $x = 1
  ;If the download was complete and unsuccessful
  ElseIf $inet_info[2] = True And $inet_info[3] = False Then
   ConsoleWriteError("Download error: "&_ArrayToString($inet_info)&@CRLF)
   InetClose($inet[$x])
   _ArrayDelete($inet, $x)
   $x = 1
  EndIf
Next
EndFunc

- but I eventually hit an array range exceeded error.

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#2 ·  Posted (edited)

Which makes sense. When you're going from 0 to MaxIndex and deleting, you're lowering the the index value of the array on each loop.

Easiest solution, go backwards.

#include <Array.au3>
Dim $asInet[5] = ["1", "a", "2", "b", "3"]
_ArrayDisplay($asInet)
For $i = UBound($asInet) -1 To 0 Step -1
 ConsoleWrite($asInet[$i] & @CRLF)
 _ArrayDelete($asInet, $i)
Next
If Not IsArray($asInet) Then ConsoleWrite("No longer an Array!")
Edited by ZacUSNYR

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#3 ·  Posted (edited)

Go from last to first element.

For $x = UBound($inet)-1 To 1 Step -1
....
Next
Edited by hannes08

Regards,Hannes[spoiler]If you can't convince them, confuse them![/spoiler]

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Ah - so the Ubound($inet) is evaluated once, not every time the loop runs?

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Quinch,

Yes, the limits are set by the For statement and are not revaluated during the loop. :)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

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

 

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Alright, that's one mystery solved, then. Thanks for the help.

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