Function::bind Polyfill

function_prototype_bind_polyfill.cofee

unless Function::bind
  Function::bind = (obj) ->
    unless typeof this is "function"
      throw new TypeError "Function.prototype.bind - what is trying to be bound is not callable"

    slice  = [].slice
    args   = slice.call(arguments, 1)
    method = this
    noop   = ->
    bound  = ->
      return method.apply(
          if this instanceof noop then this else obj or window,
          args.concat(slice.call(arguments))
        )

    return bound