ruby MD5を集计する

Posted 2021-05-16

md5_hash = {}

Dir.glob("*.txt") do |filename|
  puts "processing " + filename
  open(filename) { |file|
    while l = file.gets
      md5 = l.strip.split("\t")[0]
      if md5_hash.has_key? md5
        md5_hash[md5] += 1
      else
        md5_hash[md5] = 1
      end
    end
  }
end

out_file = "count.csv"

puts "write result to count.csv"

out = md5_hash.map{|k,v| "#{k},#{v}"}.join("\n") + "\n"
open(out_file, "w") {|f| f.write out}