gistfile1.txt

#!/usr/bin/env ruby

require 'rubygems'
require 'zip/zip'
require 'zip/zipfilesystem'
require 'digest/md5'

Dir.glob("/Users/dan/Desktop/SAMPLE_DATA/**/*.zip").each do |f|
  begin
    puts "hash: " + Digest::MD5.hexdigest(Zip::ZipFile.open(f).read("fx.txt"))  
  rescue Zip::ZipError => e
    puts "Skipping #{f}"
  end
end