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Adding to the existing answers:

1. You don't need to require rubygems as you are not using it at all. It is usually unnecessary. See here https://stackoverflow.com/questions/2711779/require-rubygems .

2. When you have many requires you can do this trick to group them into one line:

   require 'rubygems'
   require 'mechanize'
   require 'json'
   require 'net/http'
   

   Into

   %w{rubygems mechanize json net/http}.each{|gem| require gem}