Ruby：从字节创建字符串 [英] Ruby: create a String from bytes

问题描述

我想从字节值构建一个字符串。

I would like to build a string from a byte value.

我当前使用的是：

str = " "
str[0] = byte

这似乎很好用，但我觉得它很丑陋，而且对长度超过1个字符的字符串不是很可扩展。

This seems to work fine but I find it ugly and not very scalable to strings longer than 1 character.

任何想法吗？

推荐答案

比上述任何一种方法都简单得多：数组#pack ：

There is a much simpler approach than any of the above: Array#pack:

>> [65,66,67,68,69].pack('c*')
=>  "ABCDE"

我相信打包是在Matz红宝石中用c实现的，因此它的速度也要快得多

I believe pack is implemented in c in matz ruby, so it also will be considerably faster with very large arrays.

此外，pack可以使用'U *'模板正确处理UTF-8。

Also, pack can correctly handle UTF-8 using the 'U*' template.

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