rem: return this.select(function(value) { return !values.include(value); }); 
add: return this.map(function(value, index) { return {value: value, criteria: iterator(value, index)}; }).sort(function(left, right) { 
context:     return this.select(function(value) {      return !values.include(value);    });
meta: 8434	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8434/6873fc8026e87544ee93e0d9551ae57083313cff/prototype.js/clean/vendor/rails/railties/html/javascripts/prototype.js