Synchronization - After a Point in Time

suggest change

syncer = Queue.new

a = Thread.new do
  syncer.pop
  puts "this happens at end"
end

b = Thread.new do
  puts "this happens first"
  STDOUT.flush
  syncer << :ok
end

[a, b].map(&:join)

Found a mistake? Have a question or improvement idea? Let me know.

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