return this.inject([], function(array, value) { return array.concat(value && value.constructor == Array ? value.flatten() : [value]); 
return this.select(function(value) { return value != null; 
    return this.inject([], function(array, value) {      return array.concat(value && value.constructor == Array ?        value.flatten() : [value]);    });
6462	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6462/504ddcbe796d50bebfce56e8823e38e30e0e7aeb/prototype.js/buggy/wp-includes/js/scriptaculous/prototype.js