はてなブックマーク

class SmallSample var _random = Random() def randomString(length as int, alphabet as String) as String require length > 0 alphabet <> '' ensure result.length == length test utils = SmallSample() assert utils.randomString(5, 'ab').length == 5 s = utils.randomString(1000, 'a') for c in s, assert c == 'a' body sb = StringBuilder() for i in length c = alphabet[_random.next(alphabet.length)] sb.append(