CoffeeScript Class Cheatsheet

coffeescript-class-cheatsheet.coffee

class ClassName

  # shared via closure over constructor
  # class and instance functions have access to this variable
  privateVariable = 'privateVariable'
    
  # shared via closure over constructor
  # not exposed in instance
  # doesn't have access to instance
  # @ is the window object
  # class and instance functions have access to this function
  privateFunction = -> 'privateFunction'
  
  # shared via prototype
  classVariable: 'classVariable'
  
  # shared via prototype
  classFunction: -> 'classFunction'

  constructor: ->
    
    # unique per instance
    # not exposed in instance
    # only instance functions have access to this variable
    instancePrivateVariable = 'instancePrivateVariable'
      
    # unique per instance
    # not exposed in instance
    # has access to instance as @
    # only instance functions have access to this function
    instancePrivateFunction = => 'instancePrivateFunction'

    # unique per instance
    @instanceVariable = 'instanceVariable'

    # unique per instance
    @instanceFunction = -> 'instanceFunction'