Usage: ./json_to_csv.rb {jsonFile}

json_to_csv.rb

#! /usr/bin/env ruby
# encoding: UTF-8

require 'csv'
require 'json'

f          = File.open("./#{ARGV[0]}", "r")
csv_string = CSV.generate do |csv|
  f.each_line do |json|
    begin
      hash = JSON.parse(json)
      csv << hash.values
    rescue Exception => e
      puts e
    end
  end
end

File.open("#{ARGV[0]}.csv", "w") { |f| f.write(csv_string) }