>>> from prototype import *

>>> @constructor
... def Person(this, first, last):
...   this.firstName = first
...   this.lastName = last
...
>>> Person
<constructor 'Person'>

>>> bird = Person('Charlie', 'Parker')
>>> bird.firstName
'Charlie'
>>> bird.lastName
'Parker'

>>> print bird.age

None

>>> def sing(this):
...   print '%s sings!!' % this.lastName
...
>>> bird.sing = sing
>>> bird.sing()
Parker sings!!

>>> Person.prototype.sing = sing

>>> monk = Person('Thelonious', 'Monk')

>>> monk.sing()

Monk sings!!

>>> monk.__proto__ == Person.prototype

True

>>> monkJr = Person('T.S.', 'Monk')

>>> monkJr.__proto__ = monk

>>> monk.hair = 'black and curly'

>>> monkJr.hair

'black and curly'

>>> assert monkJr.constructor == monk.constructor == Person

>>> assert Object.prototype.constructor == Object

>>> assert Person.prototype.constructor == Person

>>> assert Person.prototype.__proto__ == Object.prototype

>>> def getName(this):
...   return '%s %s' % (this.firstName, this.lastName)
...
>>> Person.prototype.name = property(getName)
>>> bird.name
'Charlie Parker'

>>> def setName(this, name):
...   first, last = name.split(' ')
...   this.firstName = first
...   this.lastName = last
...
>>> def deleteName(this):
...   del this.firstName
...   del this.lastName
...
>>> Person.prototype.name = property(getName, setName, deleteName)
>>> bird.name = 'Dizzy Gillespie'
>>> bird.name
'Dizzy Gillespie'
>>> del bird.name
>>> bird.name
'None None'

>>> @constructor

... def Data(this, **kwargs):
...   for key in kwargs.keys():
...     setattr(this, key, kwargs[key])
...

>>> project = Data(project='prototype.py', language='python')

>>> file = Data(fileName='prototype.py', fileExt=property(getExt), 

                    read=read, write=write)

method = new.instancemethod(function, object)

Array.prototype.collect = function(f){

  var ret = [];

  for each(var it in this) ret.push(f(it));

  return ret;

}

Array.prototype.setPropertyIsEnumerable('collect', false);

[1,2,3].collect(function(i){ return i * 2; });

// result would be [2,4,6]

function addMethodsTo(cls:Class, methods){
    for (var name:String in methods){
        cls.prototype[name] = methods[name];
        cls.prototype.setPropertyIsEnumerable(name, false);
    }
}

addMethodsTo(Array, {
    collect: function(f){
        var ret = [];
        for each(var it in this) ret.push(f(it));
        return ret;
    },

    anotherMethod: function(){

        ...

    },

    ...
});

// contents of includes/Array.as

(function(){
    include 'addMethodsTo.as';
    addMethodsTo(Array, {
        collect: function(f){
            var ret = [];
            for each(var it in this) ret.push(f(it));
            return ret;
        }
    });
})();

include 'includes/Array.as';

[1, 2, 3].collect(...);

new Date().format()

Warning: format is not a recognized method of the dynamic class Date.

'one, two, three'.csv2Array()

Error: Call to a possibly undefined method csv2Array through a 

    reference with static type String.

(2).minutes().ago()

Error: Call to a possibly undefined method minutes through a 

    reference with static type int.

Object('one, two, three').csv2Array();

Object(2).minutes().ago();

var x = 2;

x.minutes().ago();

TypeError: Error #1006: collect is not a function.

TypeError: Error #1006: value is not a function.

1. This is really prototype specific - prototype adds an empty underscore parameter for all Ajax request for WebKit browsers. Because apparently, Safari errors out when you try to post with an empty body on XHR calls. And, who knows, this might already be fixed in WebKit. I happened to have code that was not handling this fact on the server side. This was no biggy.
2. This is an error on my part really, but I had a form with a text input inside. But also registered for the key events on the text input so that when enter is pressed I called form.submit(). The key event code is really unnecessary because an enter on the text input triggers the form submit on both FF and IE. So, although on the other 2 browsers this was no problem, in WebKit this triggers 2 posts. So... just DON'T do this.
   

• The end result was probably 20% more succient.
• I love the css 3 capable selectors, it's very refreshing to be able to use attribute and partial string match selectors which normally you don't get to use for your work. 
• I also like the way attributes are set as chained methods(again, in the monad flavor), you do something like $('#myid').attr('value') to get the value and $('#myid').attr('value', 1) to set the value to 1. This again, allows you to chain stuff together. What's the point of this? ...I guess I just like the monad thing.
• I think the jQuery syntax for behavioral javascript is prettier than prototype.js + lowpro.js
  

var Person = Class.create({

  initialize: function(){

    console.log('hello world!');

  }

});

var Pirate = Class.create(Person,{

  initialize: function($super){

    console.log('before super');

    $super();

    console.log('after super');

  }

});

new Person();

new Pirate();