## mark a section (Learn more)

$depth = 0 def outer name if ($depth+=1) < 2000 outer name else 250.times { Thread.new do inner :inner, name, Thread.current end.join } end end def inner innerName, outerName, parent Thread.new do parent.join k = Proc.new {|n0, n1| q = n0.to_s << n1.to_s } k[innerName, outerName] end end outer :outer

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