node.js - Error in parsing json array accepting multiple values -

whenever giving single data element in json file code works fine,but give array of elements starts showing undefined on client side. server side code.

var app = require('express')()   , server = require('http').createserver(app)   , io = require('socket.io').listen(server); var fs= require('fs'); server.listen(3000);  app.get('/', function (req, res) {   res.sendfile(__dirname + '/cli_index.html'); });  io.sockets.on('connection', function (socket) { var file = __dirname + '/data.json';   fs.readfile(file, 'utf8', function (err, data) {     if (err) {       console.log('error: ' + err);       return;     }     data = json.parse(data);   // can save values somewhere or log them console     console.log(data);     socket.emit('news', { hello: data});  });    }); 

this client side code.

<script src="/socket.io/socket.io.js"></script> <script>   var socket = io.connect('http://localhost');   socket.on('news', function (data) {   json.stringify(data);   for(var i=0;i<2;i++){    document.write(data[i].hello.name); }   });  </script> 

this external json file.

[{"name":"hey"},{"name":"gouraw"}]

in server side code:

socket.emit('news', { hello: data}); 

...you're sending array hello property of object, client-side code:

document.write(data[i].hello.name); 

...is expecting top-level array, individual hello properties each entry. change to:

document.write(data.hello[i].name); 

...so you're indexing array.

it best, well, limit loop using array's length rather hardcoded value:

 for(var i=0;i<data.hello.length;i++){