Module method for caching jQuery selectors

module.cache.js

(function(window, document, $, undefined){

  var self = $.Module = {};

  self.init = function() {

    this.cache();

  };

  self.cache = function() {

    var _storage = {};

    self.cache = {

      $: function(selector, clear) {

        clear = ( typeof clear !== 'undefined' ) ? clear : false;

        if ( typeof _storage[selector] !== 'undefined' && ! clear ) {
          return _storage[selector];
        } else {
          return _storage[selector] = $(selector);
        }

      },

      get: function() {
        return _storage;
      },

      flush: function() {
        _storage = {};
      }

    };

  };

  self.init();

}(this, this.document, this.jQuery));