https://gist.github.com/naomik/7178262 Now With More Dependencies!!

dblr.js

// riff off https://gist.github.com/naomik/7178262
var through = require('through');

var doubler = function doubler(data){
  data = data.toString();
  this.queue(data + data);
};

var uppercaser = function uppercaser(data){
  this.queue(data.toString().toUpperCase());
};

process.stdin
  .pipe(through(doubler))
  .pipe(through(uppercaser))
  .pipe(process.stdout);