(function(batch, output) { 
                for (var i = 0; i < batch.length; i++) { 
                        // batch[i] is the unique set of inputs/individual record 
                        // batch[i].<field> gives access to the field value 
                        var in0 = gs.nil(batch[i].record_type) ? '' : batch[i].record_type;
                        var in1 = gs.nil(batch[i].operating_system) ? '' : batch[i].operating_system;
                        // output[i] is the output for the specific combination of inputs/individual record 
                        output[i] = in0 + "_" + in1; 
                    } 
                } 
            })(batch, output);

(function(batch, output) { 
                for (var i = 0; i < batch.length; i++) { 
                        var userId = (batch[i].user_id);
                        var userIdParts = userId.split(".");
                        output[i].first_name = userIdParts[0]; 
                        output[i].last_name = userIdParts[1];
                    } 
                } 
            })(batch, output);

(function(batch, output) { 
                for (var i = 0; i < batch.length; i++) { 
                        // batch[i] is the unique set of inputs/individual record 
                        // batch[i].input gives access to the field value 
                        var in0 = gs.nil(batch[i].input) ? '' : batch[i].input; 
                        // output[i] is the output for the specific combination of inputs/individual record 
                        output[i] = in0 + " modified by script"; 
                    } 
                } 
            })(batch, output); 

/* Example Script
 (function(batch, output) {
     for (var i = 0; i < batch.length; i++) {
         //step1: access the input variables
         var a = batch[i].input; //Value of the source field.
 
         //step2: Your script/code goes here.
         var b = a + 1;
         //step3: set the output for each elements
         output[i] = b;
     }
 })(batch, output);
*/