Is there any way other than using 'eval'?
s = '"\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E"'
puts eval s
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You can guard against bad strings with a simple regex, in which case an `eval` is a lot less risky. A very similar regex would give you the hex codes direct and you could `unpack` them. – Neil Slater Apr 11 '14 at 14:50
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See this answer: http://stackoverflow.com/a/22090177/1120015 – Uri Agassi Apr 11 '14 at 15:28