my question is that what function of the 'c.pipe(c)' in blow program. if no 
c.pipe(c), what's the difference? thanks!
var net = require('net');
var server = net.createServer(function(c) { //'connection' listener
  console.log('server connected');
  c.on('end', function() {
    console.log('server disconnected');
  });
  c.write('hello\r\n');
  c.pipe(c);
});
server.listen(8124, function() { //'listening' listener
  console.log('server bound');
});
 

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