how to send message to specific client using ws node js

1var Server = require('ws').Server;
2var port = process.env.PORT || 9030;
3var ws = new Server({port: port});
4
5var sockets = [];
6ws.on('connection', function(w){
7  
8  var id = w.upgradeReq.headers['sec-websocket-key'];
9  console.log('New Connection id :: ', id);
10  w.send(id);
11  w.on('message', function(msg){
12    var id = w.upgradeReq.headers['sec-websocket-key'];
13    var message = JSON.parse(msg);
14    
15    sockets[message.to].send(message.message);
16
17    console.log('Message on :: ', id);
18    console.log('On message :: ', msg);
19  });
20  
21  w.on('close', function() {
22    var id = w.upgradeReq.headers['sec-websocket-key'];
23    console.log('Closing :: ', id);
24  });
25
26  sockets[id] = w;
27});
28
29