Service Catalog: use a loop to get variable values with very similar names (sc_item_option_mtom)

current.variables.<variable_name> works fine when you know the variable name

but what if you have a number of repeat variables with very similar names on the catalog item form, such as
retail_kit_1
retail_kit_2
retail_kit_3
...

And you wish to loop round and get all the values, and then use them to carry out a repeat task (for example, insert new CIs into the CMDB)?

must be an easier way of doing this...but until I find it here's some code that does the trick:

repeat fields on the catalog item form:

code to loop round these, for example in the RITM workflow:

//--get a load of variable values which are named very similar

var grRITM=new GlideRecord('sc_req_item');

if (grRITM.get('number', 'RITM0016189')){

   getVariables (grRITM);

}

function getVariables (grRITM){

    var variablePrefix='retail_kit_';

          

    for (i=1;i<10;i++){

        var kit_extra= get_variable(variablePrefix+i, grRITM);

                if (!gs.nil(kit_extra)){

          gs.print(kit_extra);

                }

         

    }

}

function get_variable (variable_name, grRITM){

        //--retrieve a variable value where the variable name is passed in as a string

        var sReturn='';

        var varGR=new GlideRecord('sc_item_option_mtom');

        varGR.addQuery('request_item', grRITM.sys_id);   //--sys id of the sc_req_item

                varGR.addQuery('sc_item_option.item_option_new.name='+variable_name);

        varGR.query();

               

        if(varGR.next()){

             var gr= new GlideRecord ('sc_item_option');

            gr.addQuery('sys_id', varGR.sc_item_option.toString());

            gr.query();

                       

            if(gr.next()){

                sReturn=gr.value; //--sys id, typically for this search          

            }

        }

        return sReturn;

}