hexdecoder

gistfile1.txt

#!/usr/bin/env ruby

require 'canal'

if ARGV.empty?
  puts %q{usage: hexdump [hex hex hex ...]}
else
  puts ARGV.map(&canal.chars
                      .each_slice(2)
                      .to_a
                      .reverse
                      .map(&canal.join
                                 .to_i(16)
                                 .chr)
                      .join)
           .join
end