iife_eg

(function() {

  // create global namespace
  window.game = {};

  // add some data
  game.player = {
    name: 'rob',
    score: 5
  };

  game.enemies = [];

  game.enemies.push({
    name: "zombie",
    hp: 10
  });
    
    game.alertMe = function(player){
        alert(player.name);
    };

}());


(function(player) {

  // set up the UI
  alert(player.name);
  alert(player.score);
    
  game.alertMe(player);  

}(game.player));