Don't know how to pass two different arguments to the command line.

Question

I have modified the get function to take two arguments. One of them is topic but when I type in node app.js chalkers JavaScript the app is reading the second argument as another user.
Here is a snapshot of my workspace https://w.trhou.se/8ydc2e87oh .
Please help.

Farid Wilhelm Zimmermann · Accepted Answer

After you slice the process.argv array, you call users.forEach(profile.get).
The forEach method is iterating over each of the members of your users array, passing its callback parameter (which is each element of your users array) to the profile.get function. That way you are invoking profile.get multiple times, which leads to multiple API calls in turn. For every time the forEach iterates over your users array, it only passes down 1 parameter to the profile.get function.
To fix this, you should do something like this.
```javascript
const profile = require('./profile.js');
const users = process.argv.slice(2);
profile.get(users[0], users[1])
```
^ if you are expecting only two command line arguments
```javascript
const profile = require('./profile.js');
const users = process.argv.slice(2);
for (let i = 0; i < users.length; i+= 2) {
  profile.get(users[i], users[i + 1])
}
```
^if you have an unknown number of users and topics you want to retrieve. However, this will lead to an error, if you are not passing in the proper number of command line arguments.
Hope it was understandable!

James Estrada · Answer

You could also use destructuring and a for...of loop to go through each username for a particular topic, for example:
```JavaScript
const profile = require('./profile.js');
//take the first element of the array as the topic and the rest as an array of usernames
let [topic, ...usernames] = process.argv.slice(2);
//go through each username and pass the same topic to each one of them as arguments to the get method
for (let username of usernames){
  profile.get(topic, username);
}
```
You can modify the above to add more topics and loop through each one of them as well.

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Przemyslaw Mazur

Przemyslaw Mazur

Don't know how to pass two different arguments to the command line.

2 Answers

Farid Wilhelm Zimmermann

Farid Wilhelm Zimmermann

Przemyslaw Mazur

Przemyslaw Mazur

David Soards

David Soards

James Estrada

James Estrada

Fabian Forsström

Fabian Forsström