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JohnOne

Checking array elements

5 posts in this topic

#1 ·  Posted (edited)

Is there a way to check if an array element exists ?

I know about ubound() and that and for...next loops

But the stucture of my code is like this

$sVar = StringSplit("1,2,3,4",",") ;<======= Unknown string length
If ($sVar[1]) Then
    MsgBox(0,"","OK")
EndIf
If ($sVar[2]) Then
    MsgBox(0,"","OK")
EndIf
If ($sVar[3]) Then
    MsgBox(0,"","OK")
EndIf
If ($sVar[4]) Then
    MsgBox(0,"","OK")
EndIf
If ($sVar[5]) Then
    MsgBox(0,"","OK")
EndIf

Bearing in mind that MsgBox(0,"","OK") is not the same in reality for each condition.

I cannot find a solution to check in this fashion

Any tips ?

Edited by JohnOne

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JohnOne,

I presume you are trying to avoid a "Subscript out of range" error. If you check whether there are sufficient elements BEFORE actually testing the element, you do not get an error - even though you have code referencing the non-existent element: :)

$sVar = StringSplit("1,2,3,4",",") ;<======= Unknown string length

If $sVar[0] > 0 Then
    If ($sVar[1]) Then
        MsgBox(0,1,"OK")
    EndIf
EndIf
If $sVar[0] > 1 Then
    If ($sVar[2]) Then
        MsgBox(0,2,"OK")
    EndIf
EndIf
If $sVar[0] > 2 Then
    If ($sVar[3]) Then
        MsgBox(0,3,"OK")
    EndIf
EndIf
If $sVar[0] > 3 Then
    If ($sVar[4]) Then
        MsgBox(0,4,"OK")
    EndIf
EndIf
If $sVar[0] > 4 Then
    If ($sVar[5]) Then ; non-existent element referenced, but no error
        MsgBox(0,5,"OK")
    EndIf
EndIf

Or do I have the wrong end of the stick? :(

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:

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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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You know you want UBound, so why don't you use it?

(or in this case you could use the first element from StringSplit)

$sVar = StringSplit("1,2,3,4",",") ;<======= Unknown string length
If ($sVar[0] = 1) Then
    MsgBox(0,"","1")
ElseIf ($sVar[0] = 2) Then
    MsgBox(0,"","2")
ElseIf ($sVar[0] = 3) Then
    MsgBox(0,"","3")
ElseIf ($sVar[0] = 4) Then
    MsgBox(0,"","4")
ElseIf ($sVar[0] = 5) Then
    MsgBox(0,"","5")
EndIf

Or am I not understanding you right?

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