The variable $$variable

[Rob P]

I want to know if anyone has done this and how. Here's the situation, you want to create a global var on the fly. You don't know the name or value until you instantiate it.

I was trying to create a script that would allow me to create a named var on the fly rather than explicitly naming it.

My first attempt

Let ( [

expression = "Let ( "$$" & myvar = myvalue" 

] ; 

Evaluate ( expression )

)

 results in an error because you cannot concatenate the name value in the LET statement. 

Second attempt 

Let ( [

var = "$$" & "myvar" ;

val = myvalue ] ; 

Evaluate ( var = val )

)

returns zero and no global variable created.

Edited June 12, 2008 by Guest

[comment]

I don't quite see the purpose of this, but if you want it, you need to correct your first attempt so that the expression is (a) a valid text string and ( a valid expression:

Let ( [

expression = "Let ( $$" & myvar & " = " & myvalue & "; 0 )" 

] ; 

Evaluate ( expression )

)

This is assuming that the variables 'myvar' and 'myValue' have been defined and are available to the main formula.

[Rob P]

That still did not work UNTIL I quoted the value. Thanks a million. You may not see it's purpose now but perhaps somewhere you'll want to declare a variable on the fly.

Let ( [

expression = 

   "Let ( $$" & $myvar & " = " & Quote ( $myval )  & "; 0 )" ] ; 

Evaluate ( expression ))

And yes your assumptions are correct.

[comment]

That still did not work UNTIL I quoted the value.

Ah, sorry about that - I used a numerical value in my test, so it slipped by.