returning.coffee

# The Ruby...
def change_state(object_id, new_state)
  object = find(object_id)
  object.state = new_state
  object.save
  object
end

# The CoffeeScript with "returning"...
change_state: (object_id, new_state) ->
  returning object: find object_id
  object.state: new_state
  object.save()

# The CoffeeScript with named result parameters...
change_state: (object_id, new_state) -> (object)
  object: find object_id
  object.state: new_state
  object.save()


# An example from the language implementation with "returning"...
free_variable: ->
  returning @temp_var
  while @check @temp_var
    ordinal: 1 + parseInt @temp_var.substr(1), 36
    @temp_var: '_' + ordinal.toString(36).replace(/\d/g, 'a')
  @variables[@temp_var]: 'var'

# An example from the language implementation with named result parameters...
free_variable: -> (@temp_var)
  while @check @temp_var
    ordinal: 1 + parseInt @temp_var.substr(1), 36
    @temp_var: '_' + ordinal.toString(36).replace(/\d/g, 'a')
  @variables[@temp_var]: 'var'