var properties = {}; var words = []; assertTripleEqual(typeof properties, 'object', "an object is an Object"); assertTripleEqual(typeof words, 'object', "so is an Array"); words.newProp = "A property on an array"; assertTripleEqual(words.newProp, "A property on an array", "assigning arbitrary properties"); assertTripleEqual(words['newProp'], "A property on an array", "can retrieve properties with square brackets");