conflist-counts.rb

require 'json'
require 'net/http'

conflist = JSON.parse(Net::HTTP.get(URI('https://raw.githubusercontent.com/afilina/dev-community-data/master/data/conferences.json')))

counts = %w(ticket_included hotel_included travel_included).map do |field|
  matches = conflist.select do |conf|
    conf['speaker_kit'] && conf['speaker_kit'][field]
  end

  [field, matches.count]
end

counts = counts.to_h

counts['all'] = conflist.count

puts JSON.pretty_generate(counts)