Opt ExpandVarStrings fails?

[CyberSlug 3]

I get a message box saying The value of foo is and nothing else... Shouldn't it also print 42 ???

Opt("ExpandVarStrings", 1)

$foo = 42

$example = "The value of foo is $foo"

Msgbox(4096,"", $example)

[Valik 472]

Not only does this not display the data contained in $foo, also, if you add some text to the end of the string like this:

$example = "The value of foo is $foo blah blah blah"

All you will get is:

The value of foo is

Which obviously has everything after the variable truncated.

[SlimShady 0]

Just like environment variables, you have to add the special char also at the end.

If you want to use the variable $foo, use it like this $foo$.

I adjusted your example:

Opt("ExpandVarStrings", 1)

$foo = 42

$example = "The value of foo is $foo$"

Msgbox(4096,"", $example)

[Jos 1,430]

Just like environment variables, you have to add the special char also at the end.

If you want to use the variable $foo, use it like this $foo$.

I adjusted your example:

Opt("ExpandVarStrings", 1)

$foo = 42

$example = "The value of foo is $foo$"

Msgbox(4096,"", $example)

<{POST_SNAPBACK}>

Correct, but shouldn't this also work ?

Opt ("ExpandVarStrings", 1)
$foo = 42
$example = "The value of $foo is $foo$"
MsgBox(4096, "", $example)

[Valik 472]

• The help file does not describe the usage like that.

  "The value of var1 is $var1".

• In my opinion, requiring a trailing $ removes most of the usefulness of this feature since it still requires manual editing of the variable to get the syntax correct. If you have to manually edit the variable, then why not just add the concatenation operator and be done with it?
• JdeB is right. If it does require both leading/trailing $, then it should not be necessary to use $$ to escape $'s since the word needs to have both before it is a variable. That means "The value of $foo is $foo$" should print correctly.

However, in the end, I don't really care how it works, I guess; I don't intend to use this feature as it makes code slightly more vague to read.

[MHz 73]

Opt("ExpandVarStrings", 1)
$foo = 42
$example = 'The value of $$foo is $foo$'
Msgbox(4096,"", $example)

This outputs 'The value of $foo is 42'

Just got to have lots of $$$$ ?

[CyberSlug 3]

In the end it doesn't work yet

EDIT: Okay, MHz's method works, but the documentation is wrong then. And the truncation thing that Valik pointed out is a bug.

I really would like to use this feature in AutoBuilder when doing code generation:

'GuiCreate("MyGUI", ' & $w & ", " & $h & ",(@DesktopWidth-" & $w & ")/2, (@DesktopHeight-" & $h & ")/2 , 0x04CF0000)"

versus

'GuiCreate("MyGUI", $w , $h ,(@DesktopWidth - $w )/2, (@DesktopHeight - $h )/2 , 0x04CF0000)'

Edited October 17, 2004 by CyberSlug

[Jos 1,430]

In the end it doesn't work yet

I really would like to use this feature in AutoBuilder when doing code generation:

'GuiCreate("MyGUI", ' & $w & ", " & $h & ",(@DesktopWidth-" & $w & ")/2, (@DesktopHeight-" & $h & ")/2 , 0x04CF0000)"

versus

'GuiCreate("MyGUI", $w , $h ,(@DesktopWidth - $w )/2, (@DesktopHeight - $h )/2 , 0x04CF0000)'

<{POST_SNAPBACK}>

CyberSlug,

I think it should be:

'GuiCreate("MyGUI", $w$ , $h$ ,(@DesktopWidth - $w$ )/2, (@DesktopHeight - $h$ )/2 , 0x04CF0000)'

[CyberSlug 3]

Actually, here's what I want--I need the double @ symbol:

Opt("ExpandVarStrings", 1)
Dim $w = 300, $h = 200
$output = 'GuiCreate("MyGUI", $w$, $h$, (@@DesktopWidth-$w$)/2, (@@DesktopHeight-$h$)/2, 0x04CF0000)'

MsgBox(4096,"Result", $output)

Edited October 17, 2004 by CyberSlug

[CyberSlug 3]

Another question, is there any way to get arrays to work?

$x[5]$

$x$[5]

seem to fail

[Jon 868]

Yeah it needs a leading and trailing $ - otherwise you wouldn't be able to do

$foo = "there"

msgbox(0, "", "hello$foo$hello")

[CyberSlug 3]

Workaround for arrays is to use Assign:

Opt("ExpandVarStrings", 1)

Dim $x = StringSplit("ABCD","");creates array $x[0], ..., $x[4]
For $i = 0 To 4
   Assign("x" & $i, $x[$i]);create vars x0, ..., x4
Next

MsgBox(4096, "Example", "One $x1$ Two $x2$ Three $x3$ Four $x4$")