gistfile1.js

var http = require("http");

var urls = process.argv.slice(2).map(function(d){
    return {"url": d, "content": null};
});

process.argv.slice(2).forEach(function(url){

    http.get(url,function(request){

        var total = "";

        request.on("data",function(data){
            total += data.toString();
        });

        request.on("end",function(){
            
            urls[urls.map(function(u){
                return u.url;
            }).indexOf(url)].content = total;

            var numComplete = urls.filter(function(u){
                return u.content !== null;
            }).length;

            if (numComplete == urls.length) {
                urls.forEach(function(u){
                    console.log(u.content);
                });
            }
        });
    });

});