javascript - Node.js scope of a variable inside a function -

i getting started node.js, , on small program writing running problem when trying pass variable.

i have function pass line have read file. in function create mongoose model of line , try save database. working fine, in cases there wrong data , can't saved database save text file.

i added call save file, file gets created empty. when debugging code, console messages displayed , appears @ point in execution line empty string. proper way pass value ?

var parserecord = function (line) {     var arrayofstring = line.tostring().split(" ");      if (arrayofstring[0].substr(0,1) != '#'){         var dbrecord = new logentry({             logdatetime: arrayofstring[0] + ' ' + arrayofstring[1],             serverip: arrayofstring[2],             requestmethod: arrayofstring[3],             uristem: arrayofstring[4],             serverport:arrayofstring[6],             clientip:arrayofstring[8],             browsertype:arrayofstring[9],             referrersite:arrayofstring[10],             httpstatus:arrayofstring[11],             bytessent:arrayofstring[12],             bytesreceived:arrayofstring[13],             elapsedtime:arrayofstring[14]         });          dbrecord.save(function (err) {             if (err) { //                console.log("skipped 1 record"); //                console.log("this skipped line:" + bufferedline);                 fs.appendfile('skippedrecords.txt', line, function (err) {                     if (err)                         console.log("could not write skipped record");                 });                 //skippedrecords++;             } else {                 //insertedrecords++;             }         })         //dbrecord.print();     } } 

thank suggestions. --md