UDP socket programming HELP

I am looking for good tutorials on UDP socket programming. I have already googled, and I have not found any help through that, and so, I am posting it here. My basic goal is to read and wr开发者_开发百科ite data on a remote machine through the UDP Port, and I would appreciate it if anyone could offer me some help / links to tutorials on that.

My ultimate goal is to code that in Ruby and/or Lua, but a tutorial in any language would be convenient to understand logic.

Thanks !

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http://betterlogic.com/roger/2010/03/ruby-udp-socket-example/