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Hanwen Zhang
20,084 PointsWhy in the video when we use const users = process.argv.slice(2) we don't need the line const username = ['chalkers',~~]
The note I am taking from the video
//make the application flexible
//wrap the code in a function get Profile
function getProfile(username) {
// Connect to the API URL (https://teamtreehouse.com/username.json)
const request = https.get(https://teamtreehouse.com/${username}.json, response => {
let body = "";
// Read the data
response.on('data', data => {
body += data.toString();
});
response.on('end', () => {
// Parse the data
const profile = JSON.parse(body);
// Print the data
printMessage(username, profile.badges.length, profile.points.JavaScript);
});
});
}
// const username = ['chalkers','alenaholligan', 'dave']; // getProfile('chalkers'); // getProfile('alenaholligan');
//slice here from the 3rd number in an array, we don't want the first 2
const users = process.argv.slice(2); //command line like node app.js chalker alena dave to check data users.forEach(getProfile); //shorten //users.forEach(usernmae => { getProfile(usernmae); }
1 Answer
Brandon White
Full Stack JavaScript Techdegree Graduate 34,660 PointsHi Hanwen,
I’m not 100% sure that I understand your question, but if you’re wondering why you use the slice method, it’s because argv will return the following array:
[‘node’, ‘app.js’, ‘chalker’, ‘alena’, ‘dave’].
It returns every string that makes up the command, but you only want to pass the final three into the for loop.
Does that answer your question?
Henry Blandon
Full Stack JavaScript Techdegree Graduate 21,521 PointsHenry Blandon
Full Stack JavaScript Techdegree Graduate 21,521 PointsHanwen Zhang, The process.argv property returns an array containing the command-line arguments passed when the Node.js process was launched. This mean you pass the user name information in the command-line, like so: node app.js chalkers alenaholligan dave. in addition of the names you pass, it will return two more element in the array index 0 and index 1, you do no want the first two, therefore you slide them. if you try console.log(process.argv) you should be able to see the first two elements I am talking about.