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mrbrdo/gist:6781659

Created October 1, 2013 16:56
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gistfile1.txt
2.0.0p247 :005 > pid = spawn("true")
=> 79236
2.0.0p247 :006 > Process.waitpid(79236)
=> 79236
2.0.0p247 :007 > Process.waitpid(79236)
Errno::ECHILD: No child processes
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