demostrate how to delay prompt after job completion

prompt_test.coffee

readline = require('readline')                                                              
rl = readline.createInterface(process.stdin, process.stdout)
prefix = 'OHAI> '

rl.on 'line', (line)->
  switch line.trim()
    when 'hello'
      setTimeout (->
        console.log 'world!'
        rl.prompt()
      ), 1000
      break
    else
      console.log 'Say what? I might have heard `' + line.trim() + '`'
      break
  rl.setPrompt prefix, prefix.length

rl.on 'close', ->
  console.log 'Have a great day!'
  process.exit 0

console.log prefix + 'Good to see you. Try typing stuff.'
rl.setPrompt prefix, prefix.length
rl.prompt()