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JavaScript

Posted by marco nacianceno
marco nacianceno
1,625 Points

process.argv.slice don't display nothing

Im in the course of NodeJs in th video of Capturing Command Line Arguments when we use de process of argv at the end of the code 

var https = require('https');


function printMessage(username, badgeCount,points){
  var message = `${username} has ${badgeCount} total badge(s) and ${points} points in JavaScripts`;
  console.log(message);
}

function getProfile(username){
        //Conection to the treehouse API
        var request = https.get(`https://teamtreehouse.com/${username}.json`, function (response){

            let body = "";
            //Read Data
            response.on('data',data =>{
                body += data.toString();
            });
            response.on('end', ()=>{
            //Parse Data
                const profile = JSON.parse(body);
            //Print Data
            printMessage(username,profile.badges.length,profile.points.JavaScript);
            });
        });
}

//IN THIS PART//
var users= process.argv.slice(2);
users.forEach(getProfile);

and then we execute de app with the node app.js instruction, the console don't display nothing. is supposed to display the total of badges per user

2 Answers

simhub
simhub
26,544 Points
simhub
simhub
26,544 Points

Hi Marco, did you pass your arguments via the command line? 

$ node app.js simhub marconacianceno2

Because The process.argv property returns an array containing the command line arguments passed when the Node.js process was launched. (https://nodejs.org/docs/latest/api/process.html#process_process_argv)

Hope this helps :)

marco nacianceno
marco nacianceno
1,625 Points

Yes I pass the argumnts 

$ node app.js marconacianceno2 chalkers alenaholligan

but after that in the video erase dat arguments and execute only

$node app.js
simhub
simhub
26,544 Points
simhub
simhub
26,544 Points

hi marco, maybe i am wrong, but when Andrew Chalkley execute with 

$ node app.js

he actually hardcoded the username's into the script

var users =['marconacianceno2','chalkers','alenaholligan'];
users.forEach(getProfile);

After he changed the code to execute it via the command line 

var users= process.argv.slice(2);
users.forEach(getProfile);

$ node app.js marconacianceno2 chalkers alenaholligan

you can check the process.argv object any time 

console.log(process.argv)

or check the video again (maybe i'm wrong) - https://teamtreehouse.com/library/capturing-command-line-arguments