ruby 将带有十六进制 ASCII 代码的字符串转换为字符
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Convert string with hex ASCII codes to characters
提问by undur_gongor
I have a string containing hex code values of ASCII characters, e.g. "666f6f626172". I want to convert it to the corresponding string ("foobar").
我有一个包含 ASCII 字符的十六进制代码值的字符串,例如"666f6f626172". 我想将其转换为相应的字符串 ( "foobar")。
This is working but ugly:
这是有效但丑陋的:
"666f6f626172".scan(/../).map(&:hex).map(&:chr).join # => "foobar"
Is there a better (more concise) way? Could unpackbe helpful somehow?
有没有更好(更简洁)的方法?可以unpack以某种方式有所帮助吗?
回答by Stefan
You can use Array#pack:
您可以使用Array#pack:
["666f6f626172"].pack('H*')
#=> "foobar"
His the directive for a hex string (high nibble first).
H是十六进制字符串的指令(高半字节优先)。
回答by Cary Swoveland
Stefan has nailed it, but here's an alternative you may want to tuck away for another time and place:
Stefan 已经搞定了,但这里有一个替代方案,你可能想在另一个时间和地点藏起来:
"666f6f626172".gsub(/../) { |pair| pair.hex.chr } # => "foobar"

