Get average from postman collection results json

postman_collection_avg.rb

require 'json'

def get_avg(num_array)
  avg = num_array.instance_eval { reduce(:+) / size  }
  in_sec_f = avg / 1000
  in_sec_f.round(3).to_s + " sec"
end

# 'vendor_index_api_responses' is dir that all responses are saved
all_results = Dir["#{Dir.home}/Documents/vendor_index_api_responses/*"]
all_results.each do |file_name|
  file = File.read file_name
  data = JSON.parse(file)
  times = data["results"].first["times"].map(&:to_f)
  file_basename = File.basename(file_name, ".*")
  puts "#{file_basename}: " + get_avg(times)
end