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Modified snippet from the echo server code example in
# Minor modification on line 8 of the echo server example to
# avoid IPv4/IPv6 discrepancies when resolving 'localhost' on
# some systems, such as Mac OS X 10.6.
acceptor =, Socket::SOCK_STREAM, 0)
# Passing 'localhost' below breaks when it resolves to an IPv6 address
address = Socket.pack_sockaddr_in(4242, Socket::INADDR_LOOPBACK)
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