include Module pattern: copy VS prototype chain injection

modules.coffee

_ = require 'underscore'

includeCopy = (to, module) ->
  proto = to::
  for name, property of module
    proto[name] = property

includeInter = (to, module) ->
  m = _.clone(module)
  originalPrototype = to.prototype
  to.prototype = m
  m.__proto__ = originalPrototype
  # maybe make sure we don't loose the constructor too ?

Courage =
  sword: -> console.log 'swording'
  guts: 2

class Samurai
  # includeCopy @, Courage
  # includeInter @, Courage

s = new Samurai()
s.sword()
console.log s.guts

Also see https://gist.github.com/613924