$("select").change(function () {

$(".filter").each(function () {

$(function () { });

// IIFE - Immediately Invoked Function Expression

  (function(yourcode) {

    // The global jQuery object is passed as a parameter
    yourcode(window.jQuery, window, document);

  }(function($, window, document) {

    // The $ is now locally scoped

   // Listen for the jQuery ready event on the document
   $(function() {

     // The DOM is ready!

   });