Collect statistics of F-numbers from my photos.

gistfile1.rb

#!/usr/bin/env ruby
# -*- encoding: utf-8 -*-

f_numbers = Dir.glob("**/*.jpg").map {|jpg|
  `jhead #{jpg}`.gsub(%r{Aperture\s*:\s*(?:f/(\d+(?:\.\d+)?))}) { $1 }
}.compact.map {|f| f.to_f }

f_numbers.group_by {|f| f_numbers.count(f) }.each do |freq, f|
  puts "#{freq}: #{f.uniq.join(",")}"
end