LucidJS example

gistfile1.js

/*
   LucidJS is a lib with a .emitter constructor function (one that doesn't require the new keyword; what i 
  tend to call informal constructor functions).  It provides an object with the normal pub/sub methods; .on,
  .off and .trigger
*/

var player = _.extend({ 
  x: 0
, y: 0
, move: function(x, y){
    this.x += x
    this.y += y
    this.trigger('change', 'has moved')
  } 
, LucidJS.emitter())

player.on('change', function(msg){ console.log(msg) })
player.move(1, 2)