Created
January 6, 2015 02:07
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Computes information distance between two files
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| 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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