Find out the gender balance from a list of names

count.rb

require 'rest-client'

file = 'names.txt'
key = 'YOUR GENDER API KEY'

raw = []
results = Hash.new 0
errors = 0
num_names = 0

File.foreach file do |name|
  params = {key: key}
  params[:name] = name.split(' ')[0]
  response = RestClient.get 'https://gender-api.com/get', params: params
  raw << response.to_s

  if response.code == 200
    json = JSON.parse(response)
    gender = json['gender']

    num_names += 1
    results[gender] = results[gender] + 1

    break if num_names > 500
  else
    errors += 1
  end
end

results.each do |gender, count|
  percent = (count.to_f / num_names.to_f) * 100
  puts "#{gender}: #{count} (%.2f%)" % percent
end
puts "#{errors} Errors"

File.open("raw.json", "w+") do |f|
  f.puts raw
end