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var net = require('net');
net.createServer(socket=>{
    var server = {
        on:function(data){
            console.log(data);
        },
        once:function(data){
            console.log(data);
        },
        emit:function(data){
            console.log(data);
        },
        write:function(data){
            console.log(data);
        }
    };
    socket.write("hello!\n");
    socket.pipe(server);
}).listen(9000);