rem: return '#<Hash:{' + this.map(function(pair) { return pair.map(Object.inspect).join(': '); }).join(', ') + '}>'; 
add: return this.inject([], function(array, value) { return array.include(value) ? array : array.concat([value]); }); 
context:     return '#<Hash:{' + this.map(function(pair) {      return pair.map(Object.inspect).join(': ');    }).join(', ') + '}>';
meta: 3682	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3682/81ea0800bc8ad92d491743716cd489cad7333723/prototype.js/clean/vendor/rails/railties/html/javascripts/prototype.js