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”。我想将它转换为相应的字符串(“foobar”)。
This is working but ugly:
这很有效但很难看:
"666f6f626172".scan(/../).map(&:hex).map(&:chr).join # => "foobar"
Is there a better (more concise) way? Could unpack
be helpful somehow?
有更好(更简洁)的方式吗?解压缩可能会有所帮助吗?
2 个解决方案
#1
38
You can use Array#pack
:
您可以使用Array#pack:
["666f6f626172"].pack('H*')
#=> "foobar"
H
is 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)。
#2
15
Stefan has nailed it, but here's an alternative you may want to tuck away for another time and place:
斯特凡已经钉了它,但是这里有另一种选择,你可能想再收拾另一个时间和地点:
"666f6f626172".gsub(/../) { |pair| pair.hex.chr } # => "foobar"
#1
38
You can use Array#pack
:
您可以使用Array#pack:
["666f6f626172"].pack('H*')
#=> "foobar"
H
is 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)。
#2
15
Stefan has nailed it, but here's an alternative you may want to tuck away for another time and place:
斯特凡已经钉了它,但是这里有另一种选择,你可能想再收拾另一个时间和地点:
"666f6f626172".gsub(/../) { |pair| pair.hex.chr } # => "foobar"