Sleep in coffeescript

sleep.coffee

sleep = (ms)->
  date = new Date()
  loop
    break if (new Date())-date > ms

# from https://stackoverflow.com/questions/951021/what-is-the-javascript-version-of-sleep
# as foretold in a million passionate comments by programmers 'round the world,
# using this in business logic in javascript is a bad idea. but it sometimes comes in
# handy when trying to experiment with something in dev (like if you want to simulate
# a timeout)