orig = "847C7B71727F7A7679793B707C7A3C747C737C7F76813B75817A79";
print orig , "\n"

def test_and_print ( test_name, results ) 
  20.times { print "*" }
  print "\ntest_name: #{test_name} \nresults: \n"
  results.each { | r | 
    print "#{r}, "
  }  
  print "\n\n"
end

# see what's in each byte in the string 
# test_and_print( "to array", orig.to_a )

# test_and_print( "unpack with C*", orig.unpack('C*') )

#test_and_print( "one_char", orig.scan(/./) )

# see what's in each byte in the string

# test_and_print( "two_chars", orig.scan(/../) )

my_results = orig.scan(/../) 
test_and_print( "twochars",  my_results )

my_results =   orig.scan(/../).map{ | c | [c.to_i(16), c.to_i(16).chr] }
# test_and_print( "chr16",  my_results )

my_results =   orig.scan(/../).map{ | c | c.to_i(16).chr }
# test_and_print( "chr16_nomap",  my_results )

my_results =   orig.unpack('C*').map{ | c | 
 ("0x" + String(c)).to_i(16).chr
}

test_and_print( "unpack",  my_results )

my_results =   orig.scan(/../).map{ | c | 
 Integer("0x" + String(c))
}
test_and_print( "scan2",  my_results )

for i in -32..32 
  my_results =   orig.scan(/../).map{ | c | 
   Integer("0x" + String(c)) + i
  }
  print "scan#{i}: "
  my_results.each{ | r | print r.chr } 
  print "\n"
end   

# scan-13: wondermill.com/goforit.html