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io read file by byte (See related posts)

// description of your code here

   1  
   2  f = File.new("c\:\\test.txt")
   3  checksum = 0
   4  f.each_byte {|x| 
   5  checksum = checksum+x 
   6  puts checksum
   7  }
to ruby file byte by counter202 on Thu Dec 14 19:37:24 -0500 2006

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