Simple chat server using nodejs and coffeescript

chat.coffee

net = require 'net'
server = net.createServer()

broadcast = (client, data) ->
  client.write(data) if client.writable

for_others = (everyone, me, func) ->
  func(other) for other in everyone when me != other

remove_me = (everyone, me) ->
  everyone.splice everyone.indexOf(me), 1

clients = []
server.on 'connection', (client) ->
  clients.push client

  client.name = "#{client.remoteAddress}:#{client.remotePort}"
  client.write "[#{client.name}] Hi!\n"

  for_others clients, client, (other) ->
    broadcast other, "[#{other.name} has joined]\n"

  client.on 'data', (data) ->
    for_others clients, client, (other) ->
      broadcast other, data

  client.on 'end', ->
    for_others clients, client, (other) ->
      broadcast other, "[#{client.name}] has quit]\n"

    remove_me clients, client
    client.destroy

  client.on 'error', (e) ->
    console.log(e)


server.listen 3000
console.log 'Server running at :3000'

hi.coffee

net = require 'net'
server = net.createServer()

server.on 'connection', (client) ->
  client.write '[node] Hi!\n'
  client.write '[node] Bye!\n'
  client.end

server.listen 3000
console.log 'Server running at :3000'

log.coffee

net = require 'net'
server = net.createServer()

server.on 'connection', (client) ->
  client.write '[node] Hi\n'

  client.on 'data', (data) ->
    console.log data


server.listen 3000
console.log 'Server running at :3000'