Save the first 10,000 objects in Ruby's VM to a text file for inspection

things.rb

#!/usr/bin/env ruby

things = (0..10000).map do |n|
  begin
    ObjectSpace._id2ref(n)
  rescue
    nil
  end
end

File.open('things.txt', 'w') do |f|
  things.compact.each { |thing| f.puts(thing) }
end