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hiroaki/new_gist_file.rb

Created December 29, 2014 07:25
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Get empty port
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new_gist_file.rb
require 'socket'
class Util
def self.empty_port
s = TCPServer.open(0)
port = s.addr[1]
s.close
port
end
end
port = Util.empty_port
puts port
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