From: Brian Candler <b.candler@...>
Date: 2010-05-16T03:22:25+09:00
Subject: Re: Converting hexadecimal string to character

Michael Jackson wrote:
> Excellent. Both of these suggestions work beautifully. Clearly I need
> to familiarize myself better with sprintf and String.

Another way:

irb(main):001:0> ["41"].pack("H*")
=> "A"

This has the added benefit of being able to work on sequences of 
characters in one go.

irb(main):002:0> ["414243"].pack("H*")
=> "ABC"
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