ruby - 为什么 Ruby 中的 FixNum#to_s 方法只接受 2 到 36 的基数？

我查看了文档，甚至偷看了 C 源代码，我不明白为什么他们将接受的基数限制为 2..36。有人知道吗？ 最佳答案 正如其他人指出的那样，基数 如果您真的想要自定义基数表示，则需要定义用于数字的符号字母表。这是一个可以为您提供功能的小模块。module CustomRadix # generate string representation of integer, using digits from custom alphabet # [val] a value which can be cast to integer # [digits] a string or array of strings representing the custom digits def self.custom_radix val, digits digits = digits.to_a unless digits.respond_to? :[] radix = digits.length raise ArgumentError, "radix must have at least two digits" if radix < 2 i = val.to_i out = [] begin rem = i % radix i /= radix out << digits[rem..rem] end until i == 0 out.reverse.join end # can be used as mixin, eg class Integer; include CustomRadix; end # 32.custom_radix('abcd') => "caa" (200 base 4) equiv to 32.to_s(4).tr('0123','abcd') def custom_radix digits CustomRadix.custom_radix self, digits endend示例使用:$ irb>> require '~/custom_radix'=> true>> CustomRadix.custom_radix(12345,'0'..'9')=> "12345">> CustomRadix.custom_radix(12345,'.-')=> "--......---..-">> funny_hex_digits = ('0'..'9').to_a + ('u'..'z').to_a=> ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "u", "v", "w", "x", "y", "z"]>> CustomRadix.custom_radix(255, funny_hex_digits)=> "zz">> class Integer; include CustomRadix; end=> Integer>> (2**63).custom_radix(funny_hex_digits)=> "8000000000000000">> (2**64+2**63+2**62).custom_radix(funny_hex_digits)=> "1w000000000000000">> base64_digits = ('A'..'Z').to_a + ('a'..'z').to_a + ('0'..'9').to_a << '+' << '/'=> ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "/"]>> 123456.custom_radix(base64_digits)=> "eJA"关于ruby - 为什么 Ruby 中的 FixNum#to_s 方法只接受 2 到 36 的基数？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9827498/