javascript - automaticly genereated Set of values in a Array? -

how make array contain data values of varible random on time.

im getting distance value varible 'rssi' on time. save each postion along others in array 'arr'

this should done in javascript.

    var express = require('express');      var app = express();      var server = require('http').createserver(app);      var io = require('socket.io')(server);      var port = process.env.port || 8000;      var rssi = {};        server.listen(port,function(){      	console.log('server listening @ port %d', port);      });        // routing      app.use(express.static(__dirname + '/public'));        // server configuration      var scanner = io.of('/scanner');        scanner.on('connection',function(socket){      	      		console.log('scanner connected');      	      		socket.on('devicedata1',function(msg) {        		      		      			      			var rssi = msg.rssi;      			      			var arr = [];      			arr.push(rssi);      			console.log(arr);      		      			      			      		});          });	

the result 1 value of rssi in array.

example = [89] .         = [20] need thing arr = [89 ,20 ,56] 

you need declare arr outside on method

  var arr = [];   scanner.on('connection',function(socket){         console.log('scanner connected');         socket.on('devicedata1',function(msg) {             var rssi = msg.rssi;             arr.push(rssi);             console.log(arr);         }); 

now arr show values have been added , when on method called.