Public and private vars, class variables and functions...

cheatsheet.coffee

class Foo
  PublicProperty: "I am public"
  _privateVariable = "I am private"
  @classConst = "I'm from the class mister"

  constructor: ->
    @publicPropertyToBeSet = "lopl"

  publicMethod: -> @PublicProperty
  _privateMthod = -> _privateVariable
  getCallPrivateMthod: -> _privateMthod()
  getPrivateVar: -> _privateVariable
  @classGetConst: -> @classConst
  getClassConst: -> @constructor.classConst
  getClassConstE: -> Foo.classConst = "Can you handle me"

  modifyTheClass: -> @constructor::getClassConst = -> "You ain't getting anything from me!"


c = new Foo()
d = new Foo()

console.log c.PublicProperty # => "I am public"
console.log c.publicMethod() # => "I am public"
console.log c._privateVariable # => "undefined"
#console.log c._privateMthod() # ERROR
console.log c.getCallPrivateMthod() # => "I am private"
console.log c.getPrivateVar() # => "I am private"
console.log c.publicPropertyToBeSet # => "lopl"

console.log Foo.classConst # => "I'm from the class mister"
console.log Foo.classGetConst() # => "I'm from the class mister"
console.log c.getClassConst() # => "I'm from the class mister"
console.log c.getClassConstE() # => "Can you handle me"
console.log c.getClassConst() # => "Can you handle me"
c.modifyTheClass()
console.log c.getClassConst() # => "Can you handle me"
console.log d.getClassConst() # => "Can you handle me"
d.constructor::getClassConst = -> "You won't stop trying, do you?"
console.log c.getClassConst() # => "You won't stop trying, do you?"
console.log d.getClassConst() # => "You won't stop trying, do you?"