gistfile1.js

(function(){
 
  var restaurantsMap = (function(){
    var map,
        googleMap,
        model;

    model = function() {
      this.data = ko.observable();
      this.restaurants = ko.pureComputed(function(){
        return this.data() + "2222";
      }, this);
    };
 
    return {
      init: function() {
      },
      model: new model()
    }
  }());
 
  window.onload = function() {
    restaurantsMap.init();
    ko.applyBindings(restaurantsMap.model);
    console.log(restaurantsMap.model);
    restaurantsMap.model.data('lalalaal');
    console.log(restaurantsMap.model.data());
  }
}());