gistfile1.js

var async = require('async')
var request = require('request')

var urls = process.argv.slice(2)

console.log('urls', urls)

async.map(urls, get, function(err, results) {
  if (err) return console.error(err)

  console.log('results', results)
})

function get (url, cb) {
  request(url, function(err, res, body) {
    cb(err, body)
  })
}