Excluding last column of jQuery DataTables.net TableTools

Question

Question: How can I exclude the last column of jQuery DataTables.net when using the TableTools extras to export?

Details

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Answer 1

Just for googlers: in tabletools 2.2.3 you can now use function for mColumns

var dataTable = $grdData.DataTable({
     tableTools: {
          aButtons: [{
              "sExtends": "csv",
              "sButtonText": "csv",
              "mColumns": function ( dtSettings ) {
                   var api = new $.fn.dataTable.Api( dtSettings );

                   return api.columns(":not(:last)").indexes().toArray();
              }
          }]
     }
});