rem: Array.prototype.concat = function(){ 
add: Array.prototype.concat = function() { 
context:   Array.prototype.concat = function(){    var array = [];    for(var i = 0, length = this.length; i < length; i++) array.push(this[i]);    for(var i = 0, length = arguments.length; i < length; i++) {      if(arguments[i].constructor == Array) {        for(var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)          array.push(arguments[i][j]);      } else {        array.push(arguments[i]);      }    }    return array;  }
meta: 9859	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9859/c1f8a57fb495053291d684e68f518dd14dfa0a6f/prototype.js/clean/js_test/prototype.js