simple javascript/coffeescript inheritance

simple-inheritance.coffee

    Person = ->
        return
    Person::hello = -> alert "hello"
        
    John = ->
        Person.call @
        return
    John::__proto__ = Person:: # This is shorter, but changing __proto__ is deprecated
    # John:: = __proto__: Person::, constructor: John # this would be equivalent to the former line, but is longer!
    John::hello = -> alert "ciao"
    
    Mark = do(parent = Person)@>
        c = -> parent.call @
        c::__proto__ = parent::
        c
        
    makeClass = (prototype)->
      constructor = prototype.constructor
      constructor:: = prototype
      constructor
      
    Eric = makeClass
        __proto__: Person::
        constructor: -> Person.call @; return
        hello: -> "hej"

    (new ((new Eric()).constructor)()).hello()

    # Rough, untested new simulation
    explicit_new = (constructor)->
        # it's actually possible that these two fields are actually set *after* object construction!
        x =
            __proto__: constructor.prototype
            constructor: constructor
        constructor.call(@) ? x