Revealing module pattern in coffeescript

module.coffee

@rt = @rt ? {} # create a rt namespace if not already available

@rt.module = ->
  name      = 'fubar'

  hiddenVar = 'this is hidden'

  name: (value) ->
    return name unless arguments.length
    name = value
    this

  viewHidden: ->
    "hiddenVar is: '#{hiddenVar}'"


# test it out
module = @rt.module()

# module-pattern allows us to make variable and methods private
module.name                       # => returns name function not the variable name
module.name()                     # => 'fubar'
module.name('something new')
module.name()                     # => 'something new'

# we can write accessor methods to access the variables we want to make public.
module.hiddenVar                  # => undefined
module.viewHidden()               # => "hiddenVar is: 'this is hidden'"

# it is possible to chain methods when we return the module function in the
# getter/setter methods.
module.name('fubar again').name() # => 'fubar again'