Parallel wget with node in a few lines

parallel-wget-node.js

var fs = require('fs');
var queue = require('queue');
var wget = require('wget-improved');

var downloadUrl = function(url) {
    return function(cb) {
        try {
          // you can also change the mapping url to file here by changing the function
            var download = wget.download(url, () => ('./downloads/' + url.substring(url.lastIndexOf('/') + 1) ) , {});
            download.on('end', function() {
                () => console.log("done downloading")
            });
        } catch (e) {

        }
    };
};

var q = queue();
//change this one as needed.
q.concurrency = 5;
//here the urls can come from anything really.
var urls = ['http://example.com/image-1.jpg','http://example.com/image-2.jpg']
for (var i in urls) {
    q.push(downloadUrl(urls[i]));
    console.log("all urls pushed");
}
q.start();