check if array exists

[XInFisk]

Hey.

I've been trying to figure out, how to check if an array exists.

Here's an ex. of my script.

$cmdresread = GUICtrlRead($cmd)
    $cmdres = StringSplit($cmdresread, ",")


If $cmdres[1] = ".hps" Then
    _hp($cmdres[2], $cmdres[3])
EndIf

Func _hp($v = 0, $t = 0)
    If $v = 0 Then
            $hps = _FileCountLines(@Scriptdir & "\Console\Includes\hps.txt")
            _ConsoleWrite("DebugList 1")
            For $i = 0 to $hps
                $writehp = FileReadLine(@Scriptdir & "\Console\Includes\hps.txt", $i)
                GUICtrlSetData($Console, GUICtrlRead($Console) & @CRLF & $i & " " & $writehp)
            Next
        ElseIf $v = "start" Then
            _ConsoleWrite("Debug 1")
            If $t = 0 Then
                _ConsoleWrite("We got a error, dude :(")
            Else
                _ConsoleWrite("Debug 2")
                $hptoopen = FileReadLine(@SCRIPTDIR & "\Console\Includes\hps.txt", $t)
                _DosStart($hptoopen)
            EndIf
    EndIf
EndFunc

This works when i write ex. .hps,start,5 . But when i just write .hps, it wants to give the info from $cmdres[2] and $cmdres[3] to the func _hp. But those arrays do not exist.

I've no idea how to make it check if it exists, because even when i just write it in the script, it fails. Like this:

If $cmdres[2] = "" Then

;script

;bla bla

Else

;script

;bla bla

EndIf

Can anyone help me out? It'd be a great help!

Edit: Is this even possible?

Regards

Fisk

Edited January 21, 2008 by XInFisk

[DW1]

IsArray()

[XInFisk]

IsArray()

Thank you, but please write my post first.

IsArray() only checks if a array exists, like $cmd. I need to check if $cmdres[2], $cmdres[3] and so on, if they exists. But please correct me, if i'm wrong.

Regards

Fisk

[Thatsgreat2345]

Thank you, but please write my post first.

IsArray() only checks if a array exists, like $cmd. I need to check if $cmdres[2], $cmdres[3] and so on, if they exists. But please correct me, if i'm wrong.

Regards

Fisk

Check out Ubound.

[Malkey]

Hi there,

This post caught my eye.

XInFisk Asked, "I've been trying to figure out, how to check if an array exists."

Then, in reply to danwili XInFisk wrote, "IsArray() only checks if a array exists"

"Strange, I thought. That was the original question.

Then I saw "I need to check if $cmdres[2], $cmdres[3] and so on, if they exists"

"Ah! He wants to see if the contents of the array exists"

Then I saw"If $cmdres[2] = "" Then"

He's checked the contents.What the?

Curiosity got the better of me. What is he asking?

So I took XInFisk advise and read his post.

$cmdres = StringSplit($cmdresread, ",")

" Ah! you want to know the size of an array"

Ubound "Yer, right answer.That will work"

Then I thought (I do a lot of thinking )

The art of problem solving is asking the right question.

I left the forum.

It stuck in my brain.

The actual problem here is StringSplit($cmdresread, ",").

If there are not three commas or more in $cmdresread, then $cmdresread[3] won't exist.

As a test ,I wrote

$cmdresread1 = "zero, one, two, three"

$cmdresread2 = "zero, one, two"

MsgBox(0,"zero, one, two, three",StringInStr($cmdresread1, ",", 0, 3))

MsgBox(0,"zero, one, two",StringInStr($cmdresread2, ",", 0, 3))

Note if there are only two commas or less, StringInStr($cmdresread2, ",", 0, 3)) will returns 0.

So before you create the $cmdres array you could check if $cmdresread[3] is going to exist by checking if the third comma exists.

Example

If StringInStr($cmdresread1, ",", 0, 3)) = 0 then

or

If StringInStr($cmdresread1, ",", 0, 3)) <> 0 then

Just a thought.

[Malkey]

I wrote

If StringInStr($cmdresread1, ",", 0, 3)) = 0 then

or

If StringInStr($cmdresread1, ",", 0, 3)) <> 0 then

I forgot StringSplit puts the number of strings returned in $cmdresread[0] so the above should be

If StringInStr($cmdresread1, ",", 0, 2)) <> 0 then

There only has to be two commas to get $cmdresread[3]

Sorry