[flexcoders] GENERIC compareFucntion without hardcoding of dataField ?

[Dharmendra Chauhan]

Hi All,
        My flex2  DataGrid  has got at least 50 columns of type Date.I
also have list which opens when use select  a context menu item ,in this
list user can select  any no of columns on which he wants  multiple
sorting to be happen.

Lets say user has selected 5 Columns for multi sorting,I create 5
sortField with compareFunction in loop as follows

   var sortFieldArray:Array = new Array();
   for(var dataField in selectedColumnArray){
     var field:SortField = new SortField(dataField );

      field.compareFunction = function(itemA:Object,itemB:Object):int{
                     var dateA:Date =itemA[dataField ] ;
                     var dateB:Date =itemB[dataField ] ;

              .....
              }
             sortFieldArray.push(field);
       }
Problem which I have been facing is ,local var dataField is always 
referring to the last value of selectedColumnArray hence sorting is
happening based on last column only.

I dont want to create separate compareFunction for each column , simply
because at compilation time I dont know about the no of column which
user can choose to participate in multipleSorting.And I dont want to
create 50 compareFunction with hardcoded dataField name


Is it possible to create GENERIC compareFucntion which can take
dataField without hard coding ?

Please throw some light on this it?


Regards,
Dharmendra chauhan