Backbone Collection Updater

backbone.collection.update.js

Backbone.Collection.prototype.update = function(col_in){  
  var self = this,
      new_models = [];

  _(col_in).each(function(mod_in) {
    var new_model = self._prepareModel(mod_in),
        mod = self.get(new_model.id);
    if (mod) { 
      new_models.push(mod.set(mod_in, {silent:true}));
    } else { 
      new_models.push(mod_in);
    }
  });

  this.reset(new_models);
};