my_rack_app

# my_rack_mtd.rb
require 'rack'

def string_reverse env
  if ARGV[0].class == NilClass
    [400, {}, ["Input string missing"]]
  else
    final_str = ""
    str_arry = ARGV[0].to_s.reverse.split
    str_arry.each do |str|
      final_str << str.reverse
      final_str << " " unless str_arry.last == str
    end
    [200, {}, [final_str]]
  end
end


Rack::Handler::WEBrick.run method(:string_reverse)