Helpers for JavaScript to easily define getters and setters in CoffeeScript

getter_setter.js.coffee

Function::getter = (prop, get) ->
  Object.defineProperty @prototype, prop, {get, configurable: yes}

Function::setter = (prop, set) ->
  Object.defineProperty @prototype, prop, {set, configurable: yes}

Example:

class XY
  @getter 'square', -> x * y
  constructor: (x, y) ->

class DocumentLocator
  @getter 'location', -> self.document.location
  @setter 'location', (address) -> self.document.location = address

xy = new XY(4, 4)
xy.square # 16