jQuery queueFn: add a $.fn method or function onto the effects queue

jquery.ba-queuefn.js

/*!
 * jQuery queueFn - v0.5 - 06/18/2010
 * http://benalman.com/
 * 
 * Copyright (c) 2010 "Cowboy" Ben Alman
 * Dual licensed under the MIT and GPL licenses.
 * http://benalman.com/about/license/
 */

(function($){
  '$:nomunge'; // Used by YUI compressor.
  
  var defaults = {
    queue: 'fx'
  };
  
  $.fn.queueFn = function() {
    var args = Array.prototype.slice.call( arguments ),
      options = $.extend( {}, defaults, typeof args[0] === 'object' && args.shift() ),
      fn = args.shift();
    
    fn = $.isFunction( fn ) ? fn : $.fn[ fn ];
    
    return this.queue( options.queue, function(next){
      fn.apply( $(this), args );
      next();
    });
  };
  
})(jQuery);

// usage:
// 
// $('#foo').fadeOut().queueFn( 'remove' );
// 
// $('#bar').hide().addClass( 'fading' ).fadeIn().queueFn( 'removeClass', 'fading' );
// 
// function remove( state ){ state && $(this).remove(); };
// $('#baz').fadeOut().queueFn( remove, some_condition );