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chadbrewbaker/zdist.rb

Created January 6, 2015 02:07
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Computes information distance between two files
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zdist.rb
require "zlib"
if(ARGV.length != 2)
puts "usage: ruby zdist.rb file1 file2"
else
f1 = File.read(ARGV[0])
f2 = File.read(ARGV[1])
f1d = Zlib::Deflate.deflate(f1)
f2d = Zlib::Deflate.deflate(f2)
compressed = Zlib::Deflate.deflate(f1+f2)
puts (compressed.length - [f1d.length, f2d.length].min).to_s
end
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