rem: return jQuery.filter(expr,this).r.length > 0; 
add: return expr ? jQuery.filter(expr,this).r.length > 0 : this.length > 0; 
context: 	is: function(expr) {		return jQuery.filter(expr,this).r.length > 0;	},
meta: 1375	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1375/7d57c67749a4c38d80de6d5ed7917f4219ce34b4/jquery.js/clean/jquery/jquery.js