var.define.fmfn

/*
 * =====================================================
 * var.define( name ; value )
 *
 * RETURNS:        (bool) True or False based on proper evaluation
 * DEPENDENCIES:   none 
 * NOTES:          see var.eval for declaring multiple variables
 * =====================================================
 * 
 * This custom function is a wrapper for the
 * assignment(creation) of global variables.
 * Variables are tracked within $$VARIABLES
 */

Let ( $function.var.define.value = value; // preserve the data type of the inbound value
  Let ( [
   $$ERROR.VAR.DEFINE = ""; // Reset the global error variable for evaluation
   var.dollarsign = If ( Left ( name ; 2 ) = "$$" ; "" ; "$$" ); // check for prefixed $$
   var.calc = "Let ( " & var.dollarsign & name & " = $function.var.define.value; False )"
  ];
      If (
          Evaluate( 
              var.calc        
          ) = "?";
          Let ( $$ERROR.VAR.DEFINE = List ( "EVAL ERROR"; "-------"; var.calc ); False );
          // Insert the name of the variable into the reserved $$VARIABLES global variable
          Let ( $$VARIABLES = If ( IsEmpty ( FilterValues ( $$VARIABLES ; name ) ); List ( $$VARIABLES ; name ) ; $$VARIABLES ) ; True )
      )
  )
)