jQuery param sort (for BBQ)

jquery.ba-param-sort.js

/*!
 * jQuery param sort - v0.1 - 8/20/2010
 * http://benalman.com/
 * 
 * Copyright (c) 2010 "Cowboy" Ben Alman
 * Dual licensed under the MIT and GPL licenses.
 * http://benalman.com/about/license/
 */

// Return a sorted params string, suitable for use as a key or fragment.
// (this will most likely become part of jQuery BBQ)

(function($){
  '$:nomunge'; // Used by YUI compressor.
  
  var jq_param = $.param;
  
  jq_param.sorted = function( a, traditional ) {
    var arr = [],
      obj = {};
    
    $.each( jq_param( a, traditional ).split( '&' ), function(i,v){
      var key = v.replace( /(?:%5B|=).*$/, '' ),
        key_obj = obj[ key ];
      
      if ( !key_obj ) {
        key_obj = obj[ key ] = [];
        arr.push( key );
      }
      
      key_obj.push( v );
    });
    
    
    return $.map( arr.sort(), function(v){
      return obj[ v ];
    }).join( '&' );
  };
  
})(jQuery);

// Examples:
console.log( decodeURIComponent( $.param.sorted({z:1,b:2,ab:3,bc:4,ba:5,aa:6,a1:7,x:8}) ) );
console.log( decodeURIComponent( $.param.sorted({z:1,b:[6,5,4],x:2,a:[3,2,1]}) ) );
console.log( decodeURIComponent( $.param.sorted({z:1,b:[6,5,4],x:2,a:[3,2,1]}, true) ) );
console.log( decodeURIComponent( $.param.sorted({a:[[4,[5,6]],[[7,8],9]]}) ) );

This is now in jQuery BBQ!