enum_thread.rb

input   = (0 .. 10).to_enum
enums   = [input]
threads = []

10.times do |i|
  enums[i].each do |value|
    threads << Thread.new { output << (value + 1) }
  end
end

threads.each { |t| t.join }

enum_thread_single.rb

input   = (0 .. 10).to_enum
enums   = [input]
threads = []
 
10.times do |i|
  threads << Thread.new do
    enums[i].each do |value|
      output << (value + 1)
    end
  end
end
 
threads.each { |t| t.join }