ex9.js

var http = require('http');
var concatStream = require("concat-stream")
var urls = process.argv.slice(2);
var results = [];


function printResults (results) {
  results.forEach (function (result) {
    console.log(result)
  })
}

function httpGet (index) {
  http.get(urls[index], function (response) {
    response.setEncoding("utf8")
    response.pipe(concatStream( function (data) {
     
     results.push(data)

      if (results.length == 3) 
          printResults(results)
    }))
  })
}

for (var i = 0; i < urls.length; i++) {
  httpGet(i)
}

// /* Their solution  */
//     var http = require('http')
//     var bl = require('bl')
//     var results = []
//     var count = 0
    
//     function printResults () {
//       for (var i = 0; i < 3; i++)
//         console.log(results[i])
//     }
    
//     function httpGet (index) {
//       http.get(process.argv[2 + index], function (response) {
//         response.pipe(bl(function (err, data) {
//           if (err)
//             return console.error(err)
    
//           results[index] = data.toString()
//           count++
    
//           if (count == 3) // yay! we are the last one!
//             printResults()
//         }))
//       })
//     }
    
//     for (var i = 0; i < 3; i++)
//       httpGet(i)