var http = require('http');

var urls = [process.argv[2], process.argv[3], process.argv[4]];

var holder = [];

var endCount = 0;

for(var i in urls){

    responseCount(i, urls[i])

}

//

function responseCount(count, url){

    http.get(url, function(res){

        res.setEncoding('utf8');

        var string = '';

        res.on('data', function(chunk){

            string += chunk;

        });

        res.on('end', function(){

            holder[count] = string;

            endCount ++;

            if(endCount >= 3) {

                for(var i in holder){

                    console.log(holder[i]);

                }

​

            }

        })

    }).on('error', console.error);

 }