Rewrite app.js of Expressjs to CoffeeScript.

app.coffee

###
Module dependencies.
###

express = require 'express'

app = module.exports = express.createServer()

###
Configuration
###

app.configure -> 
	app.set 'views', __dirname + '/views'
	app.set 'view engine', 'jade'
	app.use express.bodyParser()
	app.use express.methodOverride()
	app.use app.router
	app.use express.static __dirname + '/public'

app.configure 'development', ->
	app.use express.errorHandler { dumpExceptions: true, showStack: true }


app.configure 'production', ->
	app.use express.errorHandler

###
Routes
###

app.get '/', (req,res) ->
	res.render 'index', {title: 'Express'}


###
Only listen on $ node app.js
###

if !module.parent
	app.listen 3000
	console.log "Express server listening on port %d", app.address().port

app.js

/**
 * Module dependencies.
 */

var express = require('express');

var app = module.exports = express.createServer();

// Configuration

app.configure(function(){
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(__dirname + '/public'));
});

app.configure('development', function(){
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
});

app.configure('production', function(){
  app.use(express.errorHandler()); 
});

// Routes

app.get('/', function(req, res){
  res.render('index', {
    title: 'Express'
  });
});

// Only listen on $ node app.js

if (!module.parent) {
  app.listen(3000);
  console.log("Express server listening on port %d", app.address().port);
}

app.use(express.static(__dirname + '/public'));
Currently, coffee script avoid to use static, cause it will -> express["static"].
how to solved this problem ?