thread_local_variable.rb

4.times.map do
  t = Thread.current
  t["#{dynamic_variable_name}".to_sym] = method_call
end

joined_threads = threads.map &:join
joined_threads.each do |t|
  # The keys method returns all thread local variables by names
  # analog to the Hash#keys method
  t.keys.each do |key|
    k = key.to_s.downcase
    next if k.start_with?("active") || k.start_with?("__")
    # In this example we want to have access to all this variables
    # as an instance variabel e.g. to use them in a Rails view
    instance_variable_set "@#{key}", t[key]
  end
end