CoffeeScript with named utility functions

gistfile1.coffee

var Animal, Snake;
var __hasProp = Object.prototype.hasOwnProperty;
Animal = (function() {
  function Animal() {}
  return Animal;
})();
Snake = (function() {
  __extends(Snake, Animal);
  function Snake() {
    Snake.__super__.constructor.apply(this, arguments);
  }
  return Snake;
})();
function __extends(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;
};