rem: if (!iterator(value, index)) results.push(value); 
add: memo = iterator(memo, value, index); 
context:     this.each(function(value, index) {      if (!iterator(value, index))        results.push(value);    });
meta: 1164	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1164/cb2408a82c9bc93bef177dc33a8981bc36800839/prototype.js/buggy/tools/prototype.js