another little javascript helper

helpers.js

var ApplicationHelpers = {
  /**
   * Note: requires Underscore.js
   * 
   * Enable a (sencha touch) form to have a link between
   * model and form (ie. MyModel.some_attribute <=> textfield.some_attribute)
   * AND allow for POST / PUT submission in the rails-friendly namespaced format
   * (ie. {my_model[some_attribute] : "some value"}).
   *
   * To get above behavior, treate model and forms in normal fashion and use
   * helper when settings the params for ajax submission (note: using ST 2 PR3):
   *    Ext.Ajax.request({
   *      url: '/my_model.json',
   *      method: 'POST',
   *      params: helpers.namespace_keys('my_model', params),   // <= hooray!
   *      ...
   */
  namespace_keys: function(namespace, obj) {
    var self = this,
        keys = _.keys(obj);

    return _.reduce(keys, function(newObj, k) {
      newObj[namespace + '[' + k + ']'] = obj[k];
      return newObj;
    }, {});
  }
};

// alias (it's not just a tv show)
var helpers = ApplicationHelpers;