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]);    });
4999	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4999/e47dfd7529c730bdf42c17407d64892450c0dbee/prototype.js/clean/wp-includes/js/scriptaculous/prototype.js