jQuery Deferred, throttle, debounce

debounce.coffee

debounce = (delay) ->
  lastd = $.Deferred()
  ->
    lastd.reject()
    d = $.Deferred()
    lastd = d
    args = arguments
    setTimeout ->
      d.resolve args
    , delay || 100
    d.promise()

example.coffee

th = throttle(500)

th('hello').then (msg) ->
  console.log(msg)

de = debounce(1000)

de('hello').then (msg) ->
  console.log(msg)

throttle.coffee

throttle = (delay) ->
  d = null
  ->
    return $.Deferred().promise() if d
    d = $.Deferred()
    args = arguments
    setTimeout ->
      d.resolve args
      d = null
    , delay || 100
    d.promise()