vows = require 'vows'
assert = require 'assert'

vows
  .describe('Division by zero')
  .addBatch
    'when dividing a number by zero':
      topic: -> 42/ 0

      'we get Infinity': (topic) ->
        assert.equal topic, Infinity

    'but when dividing zero by zero':
      topic: -> 0 / 0

      'we get a value which':
        'is not a number': (topic) ->
          assert.isNaN topic

        'is not equal to itself': (topic) -> 
          assert.notEqual topic, topic

  .export(module)

$ npm install -g js2coffee
$ express testapp
$ cd testapp
$  js2coffee app.js

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

app.get "/", routes.index
app.listen 3000
console.log "Express server listening on port %d in %s mode", app.address().port, app.settings.env

$ cake
$ cake test

$(function () {
    var f = function(x) { return Math.pow(x,4) - Math.pow(x,2) + 6 };
    var s = function(x) { return 12 / (Math.abs(x)+1) };
    var g = function(x) { return 1/2 * Math.cos(6*x) + 7/2 };

    var d1 = [];
    var d2 = [];
    var d3 = [];
    var d4 = [];

    for (var i = -1; i <= 1; i += 0.1)
        d1.push([i, f(i)]);

    for (var i = -7; i <= -1; i += 0.1)
        d2.push([i, s(i)]);

    for (var i = 1; i <= 7; i += 0.1)
        d3.push([i, s(i)]);

    for (var i = -2; i <= 2.1; i += 0.1)
        d4.push([i, g(i)]);

    $.plot($("#placeholder"), [ { data:d1, color: "rgb(0,0,255)" }
                  , { data:d2, color: "rgb(0,0,255)" }
                  , { data:d3, color: "rgb(0,0,255)" }
                  , { data:d4, color: "rgb(0,0,255)" }
    ]);
});

$ coffee pubsub.coffee 
Just read big news today
Just read big news today
Just read big news today
About to fall asleep reading this interesting analysis

class Publisher
  constructor: ->
    @subscribers = { any:[] }

  subscribe: (fn, type) ->
    type = type or 'any'
    @subscribers[type] = [] unless @subscribers[type]?
    @subscribers[type].push(fn)

  unsubscribe: (fn, type) -> @visitSubscriers('unsubscribe', fn, type)

  publish: (publication, type) -> @visitSubscriers('publish', publication, type)

  visitSubscriers: (action, arg, type) ->
    pubtype = type or 'any'
    subscribers = @subscribers[pubtype]
    for subscribe,i in @subscribers[pubtype]
      switch action
        when 'publish' then subscribe(arg)
        else @subscribers[pubtype].splice(i,1) if subscribe is arg

  printSubscribers: -> console.log(@subscribers)

class Paper extends Publisher
  daily: => @publish('big news today')
  monthly: => @publish('interesting analysis','monthly')

class Subscriber
  drinkcoffee: (paper) -> console.log('Just read '+ paper)
  sundayPreNap: (paper) -> console.log('About to fall asleep reading this '+ paper)

paper = new Paper
joe = new Subscriber
paper.subscribe(joe.drinkcoffee)
paper.subscribe(joe.sundayPreNap, 'monthly')
#paper.printSubscribers()
paper.daily()
paper.daily()
paper.daily()
paper.monthly()

>var ar = new Array(5);
undefined
>ar
[]
>ar.length
5

(function(){
  console.log(typeof hoisted); // function までhoistされる
  console.log(typeof notHoisted); // 変数のみhoistされるのでundefined

  var notHoisted = function(){
  };

  function hoisted(){
  }

}());

$ node t.js
function
undefined

goog.inherits = function(childCtor, parentCtor) {
  /** @constructor */
  function tempCtor() {};
  tempCtor.prototype = parentCtor.prototype;
  childCtor.superClass_ = parentCtor.prototype;
  childCtor.prototype = new tempCtor();
  childCtor.prototype.constructor = childCtor;
};