coffeescript+prototypejs使编写nodejs更象ruby-like
首先安装prototype for nodejs
prototype = require 'prototype'Object.extend global, prototype(9).times (x)-> console.log x[1,2,3,4].each (x)-> console.log xPerson = Class.create #定义一个类 initialize: (name)-> @name = name say: (message)-> "#{@name}:#{message}"Pirate = Class.create Person, #继承父类 say: ($super, message)-> "#{$super message}, yarr!"john = new Pirate 'Long John'console.log john.say 'ahoy matey' #输出Long John:ahoy matey, yarr!

Class.create takes in an arbitrary number of arguments. The first—if it is another class—defines that the new class should inherit from it. All other arguments are added as instance methods; internally they are subsequent calls to addMethods (see below). This can conveniently be used for mixing in modules:

#define a moduleVulnerable =  wound: (hp)->    @health -= hp    @kill() if @health < 0  kill: ->    @dead = true#the first argument isn't a class object, so there is no inheritance ...#simply mix in all the arguments as methods:Person2 = Class.create Vulnerable,  initialize: ->    @health = 100    @dead = falsebruce = new Person2bruce.wound 55console.log bruce.health #=> 45

coffeescript本身也自定义了类的另一种实现方式。

class Animal  constructor: (@name) ->  move: (meters) ->    alert @name + " moved #{meters}m."class Snake extends Animal  move: ->    alert "Slithering..."    super 5class Horse extends Animal  move: ->    alert "Galloping..."    super 45sam = new Snake "Sammy the Python"tom = new Horse "Tommy the Palomino"sam.move()tom.move()String::dasherize = ->  this.replace /_/g, "-"

上面的代码转换成js后，前后对比，使用coffeescript代码量少了许多。我本身比较趋向于coffeescript方式声明类。

var Animal, Horse, Snake, sam, tom,  __hasProp = Object.prototype.hasOwnProperty,  __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor; child.__super__ = parent.prototype; return child; };Animal = (function() {  function Animal(name) {    this.name = name;  }  Animal.prototype.move = function(meters) {    return alert(this.name + (" moved " + meters + "m."));  };  return Animal;})();Snake = (function(_super) {  __extends(Snake, _super);  function Snake() {    Snake.__super__.constructor.apply(this, arguments);  }  Snake.prototype.move = function() {    alert("Slithering...");    return Snake.__super__.move.call(this, 5);  };  return Snake;})(Animal);Horse = (function(_super) {  __extends(Horse, _super);  function Horse() {    Horse.__super__.constructor.apply(this, arguments);  }  Horse.prototype.move = function() {    alert("Galloping...");    return Horse.__super__.move.call(this, 45);  };  return Horse;})(Animal);sam = new Snake("Sammy the Python");tom = new Horse("Tommy the Palomino");sam.move();tom.move();String.prototype.dasherize = function() {  return this.replace(/_/g, "-");};