My learnyounode Juggling Async Solution

juggling-async.js

#!/usr/bin/env node

var http = require("http");
var concat = require("concat-stream");
var urls = [process.argv[2], process.argv[3], process.argv[4]];
var count = 0;
var results = [];

urls.forEach (function(url, i) {
  http.get(url, function(res) {
    res.on('error', console.error);
    res.pipe(concat(function(data) {
      results[i] = data.toString();
      count++;
      if (count === 3) {
        results.forEach(function(result) {
          console.log(result);
        });
      }
    }));
  });
});