let io = require('socket.io')(3000)

let io = require('socket.io') 
io.listen(3000) // io.attach(3000) 

let server = require('http').Server(); 
let io = require('socket.io')(server)

server.listen(3000) 

let server = require('http').Server(); 
let io = require('socket.io')()

io.listen(server) // io.attach(server)

server.listen(3000) 

let app = require('express') 
let server = require('http').Server(app) 
let io = require('socket.io')(server)

app.listen(3000) 

let app = require('koa')() 
let server = require('http').Server(app.callback())

let io = require('socket.io')(server)

app.listen(3000) 

let server = require('http').Server() 
let io = require('socket.io')(server)

server.listen(3000); 
io.on('connection', socket => { 
 console.log('connect')
 socket.on('disconnect', () => {
 console.log('disconnect')
 })
 socket.disconnect()
})

connect 
disconnect 

let socket = io('http://localhost:3000') 
socket.on('connect', () => { 
 console.log('connect')
})
socket.on('disconnect', () => { 
 console.log('disconnect')
})

connect 
disconnect 

let server = require('http').Server() 
let io = require('socket.io')(server)

server.listen(3000); 
io.on('connection', socket => { 
 socket.on('random', value => {
 console.log(value)
 if (value > 0.95) {
  if (typeof socket.warning === 'undefined') socket.warning = 0
  setTimeout(() => {
  socket.emit('warn', ++socket.warning)
  }, 1000)
 }
 })
})

let socket = io('http://localhost:3000') 
let interval = setInterval(() => { 
 socket.emit('random', Math.random())
}, 500)
socket.on('warn', count => { 
 console.log('warning count: ' + count)
})
socket.on('disconnect', () => { 
 clearInterval(interval)
})

io.on('connection', function (socket) { 
 let stream = ss.createStream()
 ss(socket).emit('script', stream)
 fs.createReadStream(__filename).pipe(stream)
})

let socket = io('http://localhost:3000') 
ss(socket).on('script', stream => { 
 let buffer = '' 
 stream.on('data', data => {
 buffer += data.toString()
 })
 stream.on('end', () => {
 console.log(buffer)
 })
})