问如何使用Map/reduce脚本删除大量记录？

EN

            var count=0;
                var counter=0;
                var result=[];
                var testSearch = search.create({
                    type: 'customrecord1',
                    filters: [ 'custrecord_date_created', 'notonorafter', 'sta​rtO​fLa​stM​ont​h' ],
                    columns: [ 'internalid' ]
                }); 
                do{
                    var resultSearch = testSearch.run().getRange({
                        start : count,
                        end   : count+1000
                    });
                    for(var arr=0;arr<resultSearch.length;arr++){
                        result.push(resultSearch[arr]);
                    }
                    counter = count+counter;                        
                }while(resultSearch.length >= 1000 && counter != 4000);
                return result;