VariableLocalize ( GlobalVariableName )

Changes the scope of a Global variable to a Local variable of the same name, with the same contents.

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Jonathan Mickelson - Show more from this author

Sample input:

If $$testVar = 35:
VariableLocalize ( "$$testVar" )

Sample output:

$testVar = 35 and
$$testVar = null

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/*---------------------------------------------------------------
Function Name - VariableLocalize

Syntax
~~~~~~~~~~~~~~~
VariableLocalize ( GlobalVariableName )

Description
~~~~~~~~~~~~~~~
This function Transfers the contents of a Global Variable to a Local Variable of the same name and clears the original variable.

Parameters
~~~~~~~~~~~~~~~
GlobalVariableName - The quoted name of a validly named Global variable to be made local.
                                   Example: "$$variable01"

Special Notes
~~~~~~~~~~~~~~~
This function requires FileMaker 8 or greater.

Last Modified: 9/3/05
Author - Jonathan Mickelson

---------------------------------------------------------------*/
// --------------- PRE-PROCESSING -----------------------
Case ( 
PatternCount ( GlobalVariableName ; "$$" ) = 0 ; "Error: Not a valid global variable name" ; 
// ELSE CONTINUE
Let ( 
[ 
// --------------- PROCESSING -------------------------
nameFull = GlobalVariableName ; 
val = Evaluate ( nameFull ) ; 
name = Substitute ( Left ( nameFull ; 2 ) ; "$$" ; "" ) & 
             Middle ( nameFull ; 3 ; 99 ) ; 
localize = Evaluate ( "Let ( " & "$" & name & " = " & Quote ( val ) & " ; \"\" )" ) ; 
killOld = Evaluate ( "Let ( " & "$$" & name & " = \"\" ; \"\" )" ) 
] ; 
// --------------- RESULT ----------------
""
 ) // END LET
 ) // END CASE

Requires FileMaker 8 or higher.

This function Transfers the contents of a Global Variable to a Local Variable of the same name and clears the original variable.

This is valuable for instances where a Global Variable has been used throughout a process or number of scripts and it no longer needs to exist once the current script completes. Thus the now local variable will be destroyed when the script stops, simplifying cleanup.

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

VariableLocalize ( GlobalVariableName )

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