node.js - Cant make async work with http in nodejs -

i have come across weird problem using async , http in nodejs. here code :

http = require('http'); bl = require('bl'); async = require('async');  var tasks = [];  var dataitems = [];  var callhttp = function(index, callback) {   http.get(process.argv[index], function(response) {        response.pipe(bl(function(err, data) {         if (err)           return console.log(err);         dataitems[index] = data.tostring();       }));        response.on('end', callback);      })     .on('error', console.error); }  var indices = [2, 3, 4, 5]; indices.foreach(function(item) {   tasks.push(function(callback) {     callhttp(item, callback);   }); });    async.parallel(tasks, function(err) {   console.log(dataitems); }); 

running above code using

node async-http.js 'http://www.google.com/' 'http://academics.vit.ac.in/' 'http://www.example.com'  

gives me following error:

{ [error: connect econnrefused]   code: 'econnrefused',   errno: 'econnrefused',   syscall: 'connect' } 

however, running same code in different form (by manually defining array 'tasks') seems work fine ... :

http = require('http'); bl = require('bl'); async = require('async');  var tasks = [];  var dataitems = [];  var callhttp = function(index, callback) {   http.get(process.argv[index], function(response) {        response.pipe(bl(function(err, data) {         if (err)           return console.log(err);         dataitems[index] = data.tostring();       }));        response.on('end', callback);      })     .on('error', console.error); }    async.parallel([   function(callback) {     callhttp(2, callback);   },   function(callback) {     callhttp(3, callback);   },   function(callback) {     callhttp(4, callback);   }], function(err) {   console.log(dataitems); }); 

any idea doing wrong? have searched everywhere , found no answers yet

process.argv[5] not exists.

as process.argv[5] supposed fourth argument. , have provided 3 process arguments. , making http request undefined url. , connection refused.