Simple namespacing mechanism in CoffeeScript

gistfile1.coffee

namespace = (name, func) ->
  if name.indexOf('.') > 0
    nameArray = name.split('.')
  else
    nameArray = [name]

  context = window
  for i in nameArray
    context = context[i] or= {}

  func.call context

namespace 'a', ->
  privateString = 'test'

  @b = -> alert privateString

namespace 'a', ->
  @c = -> alert 'oom!'

namespace 'a.sub', ->
  @d = -> alert 'space!'


a.c()
a.sub.d()
a.b()